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A remarkable chapter in space flight ended | 0:00:04 | 0:00:07 | |
when the Space Shuttle launched for the final time. | 0:00:08 | 0:00:11 | |
Since the early 1980s, the Shuttle has been the pinnacle of manned spaceflight technology. | 0:00:13 | 0:00:20 | |
Columbia is a beautiful ship. She's performing magnificently. | 0:00:20 | 0:00:24 | |
Horizon and the BBC have covered every step of its story. | 0:00:24 | 0:00:29 | |
A mission of 37 orbits going east from the Cape out over the Atlantic... | 0:00:30 | 0:00:37 | |
Over the last 30 years | 0:00:37 | 0:00:40 | |
the Shuttle has contributed to some dazzling scientific achievements. | 0:00:40 | 0:00:44 | |
Hey! | 0:00:47 | 0:00:48 | |
Oh! | 0:00:48 | 0:00:50 | |
Wow! | 0:00:50 | 0:00:51 | |
But the successes have been overshadowed by tragedy. | 0:00:51 | 0:00:56 | |
He said, "I don't see her. I don't see the Shuttle." I said, "It's gone." And it was. | 0:00:56 | 0:01:02 | |
You just knew it was... You knew. | 0:01:02 | 0:01:05 | |
Now that it's all over, how will the Space Shuttle be remembered? | 0:01:06 | 0:01:11 | |
As a great adventure in human space exploration? | 0:01:11 | 0:01:16 | |
Or as a fatally-flawed white elephant? | 0:01:17 | 0:01:21 | |
In the early days of the Shuttle programme, each launch was a thrilling event for America | 0:01:37 | 0:01:43 | |
and for the astronauts involved. | 0:01:43 | 0:01:46 | |
There's a period of time up on the launch pad where you're standing | 0:01:47 | 0:01:51 | |
with all the searchlights playing up on the Shuttle. | 0:01:51 | 0:01:56 | |
And here is this monster that you're about to climb into. | 0:01:56 | 0:02:00 | |
Because it's fully-fuelled and there's a certain amount of boil off of the liquid oxygen and so forth, | 0:02:00 | 0:02:08 | |
it seems like it's a hissing, breathing, alive machine. | 0:02:08 | 0:02:13 | |
The voice communications become | 0:02:13 | 0:02:16 | |
quite silent in the last minutes. You hear the counting down | 0:02:16 | 0:02:19 | |
and the main engines come on. | 0:02:19 | 0:02:22 | |
Of course, that's about, I guess, | 0:02:26 | 0:02:29 | |
1.25 million pounds of thrust. | 0:02:29 | 0:02:31 | |
You get that kick in the pants and you're up, up and away. | 0:02:33 | 0:02:37 | |
We're going something over about 100mph by the time we reach the top of the tower. | 0:02:45 | 0:02:51 | |
You're just sitting there hoping like heck that nothing happens to any of the engines | 0:02:53 | 0:02:59 | |
because your mind's thinking all the time. "What do I look for? | 0:02:59 | 0:03:03 | |
"What do I need to be ready to do?" | 0:03:03 | 0:03:06 | |
This strange, loud, roaring staccato is somehow punctuated | 0:03:09 | 0:03:13 | |
by another sound of an explosion. | 0:03:13 | 0:03:16 | |
That's the solid rockets being released. | 0:03:18 | 0:03:21 | |
It looks like you're flying through a fireball when those things go off. | 0:03:21 | 0:03:25 | |
After that point, it's very smooth. | 0:03:28 | 0:03:31 | |
The whole experience is just a tremendous adventure. | 0:03:34 | 0:03:39 | |
I smiled from ear to ear right when the engines went off | 0:03:39 | 0:03:43 | |
and said, "What an experience! Let's go back and do that again!" | 0:03:43 | 0:03:47 | |
MUSIC: "Hail To The Chief" | 0:03:47 | 0:03:50 | |
Americans were deeply proud of their new space programme. | 0:03:54 | 0:03:58 | |
CHEERING | 0:04:00 | 0:04:02 | |
The Shuttle was a symbol of the very best of American ingenuity. | 0:04:02 | 0:04:07 | |
'Ladies and gentlemen, the President of the United States and Mrs Reagan | 0:04:12 | 0:04:16 | |
'and astronauts Mattingly and Hartsfield.' | 0:04:16 | 0:04:21 | |
The fourth landing of the Columbia marks our entrance into a new era. | 0:04:23 | 0:04:28 | |
The test flights are over. The groundwork has been laid. | 0:04:28 | 0:04:32 | |
Beginning with the next flight, the Columbia and her sister ships will be fully operational. | 0:04:32 | 0:04:39 | |
The excitement echoed the celebration of the Apollo programme decades before | 0:04:42 | 0:04:47 | |
where the story of the Shuttle begins. | 0:04:47 | 0:04:51 | |
'We're go for landing. Eagle, you're go for landing. Over.' | 0:04:51 | 0:04:55 | |
'Tranquility Base here. The Eagle has landed.' | 0:04:55 | 0:04:59 | |
The American space agency, NASA, had achieved a remarkable triumph | 0:04:59 | 0:05:04 | |
in getting men to the Moon and back. | 0:05:04 | 0:05:07 | |
But even as the ticker tape fell, NASA was in trouble. The Moon shot had cost 25 billion. | 0:05:10 | 0:05:17 | |
It didn't take long for the public and politicians to question the price tag of future space travel. | 0:05:17 | 0:05:23 | |
The space programme needed to be cheaper. | 0:05:25 | 0:05:28 | |
Many at NASA had long dreamed of building a reusable craft, | 0:05:32 | 0:05:37 | |
a sleek, futuristic space plane, | 0:05:37 | 0:05:40 | |
which would launch into orbit off the back of a vast winged booster. | 0:05:40 | 0:05:44 | |
Both vehicles would be able to land on a standard runway. | 0:05:45 | 0:05:50 | |
Though reusable, this design was still too costly. | 0:05:51 | 0:05:55 | |
So in 1970, NASA was obliged to seek support from the Air Force, | 0:05:58 | 0:06:04 | |
which had already experimented with rocket planes that could skim the edge of space. | 0:06:04 | 0:06:09 | |
The Air Force agreed to collaborate, | 0:06:13 | 0:06:16 | |
but only if NASA made the space plane big enough to carry hefty spy satellites. | 0:06:16 | 0:06:22 | |
The Shuttle as we know it was born, | 0:06:30 | 0:06:33 | |
the main vehicle an enormous delta-winged orbiter, | 0:06:34 | 0:06:38 | |
its vast body covered in a patchwork of heat-resistant tiles | 0:06:40 | 0:06:45 | |
which allow it to withstand the intense heat of re-entry. | 0:06:45 | 0:06:49 | |
Too big to launch off the back of a booster plane, | 0:06:52 | 0:06:55 | |
the orbiter is instead mated with a central fuel tank | 0:06:55 | 0:06:59 | |
flanked by two solid rockets which provide the thrust to take it into orbit. | 0:06:59 | 0:07:05 | |
By 1972, the Shuttle's distinctive design was set, | 0:07:07 | 0:07:11 | |
though not everyone approved. | 0:07:11 | 0:07:14 | |
We have a vehicle which rests on a huge tank | 0:07:15 | 0:07:19 | |
which has 750,000 gallons of fuel. | 0:07:19 | 0:07:22 | |
And then there are these two great solid rocket boosters, 150 feet long, strapped on either side of it. | 0:07:22 | 0:07:29 | |
And the orbiter sits on top. | 0:07:29 | 0:07:31 | |
That's the equivalent of riding a broomstick made of dynamite with two firecrackers on either side. | 0:07:31 | 0:07:37 | |
Despite the misgivings of some, Space Shuttle Columbia was finally ready to go on April 12th, 1981. | 0:07:42 | 0:07:48 | |
20 years to the day after Russia's Yuri Gagarin first orbited the Earth. | 0:07:48 | 0:07:54 | |
From the start, NASA planned to make Shuttle flights routine | 0:08:00 | 0:08:04 | |
with launches every two weeks. | 0:08:04 | 0:08:07 | |
To help fund this ambitious schedule, crews would work with commercial satellites. | 0:08:10 | 0:08:16 | |
New ones would be deployed and old ones fixed when they broke. | 0:08:16 | 0:08:21 | |
In April, 1984, the Shuttle faced its first major challenge | 0:08:24 | 0:08:29 | |
to show that it was worth the billions it had cost. | 0:08:29 | 0:08:33 | |
Its mission was to repair the faulty electronics in a satellite called Solar Max. | 0:08:33 | 0:08:39 | |
But first, astronaut George "Pinky" Nelson had to catch it. | 0:08:44 | 0:08:49 | |
'Nelson on his way. One hour and two minutes. | 0:08:49 | 0:08:53 | |
'You'll have to hold on to it with both hands, I imagine.' | 0:08:59 | 0:09:04 | |
Unable to dock properly with Solar Max, Nelson tried to stop the satellite spinning...with his hands. | 0:09:04 | 0:09:10 | |
'If you could go in that hole, that would be fine.' | 0:09:10 | 0:09:14 | |
Nelson's efforts only made Solar Max tumble faster. It seemed a failure. | 0:09:14 | 0:09:19 | |
Happily, though, controllers managed to slow the spinning satellite | 0:09:19 | 0:09:23 | |
enough for the Shuttle to manoeuvre alongside and attempt to grab Solar Max with its robot arm. | 0:09:23 | 0:09:29 | |
- 'OK, we've got it' - Roger, copy that. | 0:09:29 | 0:09:34 | |
Outstanding! | 0:09:34 | 0:09:37 | |
'Roger. It's all downhill from here.' | 0:09:37 | 0:09:39 | |
With each passing mission, the astronauts were learning how to enjoy life in space. | 0:09:44 | 0:09:50 | |
We are given the opportunity to carry some music onboard, | 0:09:53 | 0:09:58 | |
tapes to play in a pocket stereo player. | 0:09:58 | 0:10:03 | |
There's a song called the Southern Cross | 0:10:03 | 0:10:06 | |
by Crosby, Stills, Nash and Young. | 0:10:06 | 0:10:09 | |
I remember at one point looking out the window at the Southern Cross and playing that. | 0:10:09 | 0:10:14 | |
# When you see the Southern Cross for the first time | 0:10:14 | 0:10:19 | |
# You understand now why you came this way... # | 0:10:21 | 0:10:26 | |
You could spend days just looking out the window and taking it all in, learning what continents look like. | 0:10:26 | 0:10:32 | |
# But it's as big as the promise The promise of the coming day... # | 0:10:32 | 0:10:38 | |
I used to have little dreams when I was a kid that I'd run down the street and fly into the air. | 0:10:39 | 0:10:46 | |
That's what weightlessness is like. | 0:10:46 | 0:10:48 | |
We've bee having a lot of fun up here and, of course, doing a lot of good work for the space programme. | 0:10:48 | 0:10:55 | |
The first day or so, when you're adjusting to it, | 0:10:55 | 0:10:59 | |
you flail around a lot, reach for a switch and hit the ceiling. | 0:10:59 | 0:11:04 | |
Zero G in itself causes you to find games. | 0:11:04 | 0:11:09 | |
I would be up on a flight deck, working like a good pilot, and I'd hear the guys laughing and roaring. | 0:11:31 | 0:11:37 | |
When I finally went down, there they were doing this precision drill team stuff. It was fantastic. | 0:11:37 | 0:11:44 | |
'We were constantly asking the question, "Where's Joe?" | 0:11:58 | 0:12:02 | |
'And lo and behold, what should we find... | 0:12:02 | 0:12:06 | |
'but...but look at that. | 0:12:06 | 0:12:09 | |
'We have discovered either an alien space creature | 0:12:09 | 0:12:13 | |
'or... it is! It is Dr Allan! | 0:12:13 | 0:12:16 | |
'Largest personality, but diminutive in stature, | 0:12:18 | 0:12:21 | |
'he's managed to insert himself in yet another crevice.' | 0:12:21 | 0:12:26 | |
# Somebody fine will come along Make me forget about loving you | 0:12:26 | 0:12:30 | |
# At the Southern Cross. # | 0:12:31 | 0:12:34 | |
By August, 1984, NASA was so confident that the Shuttle was now a routine space bus | 0:12:40 | 0:12:45 | |
that it launched a new publicity campaign - a competition to put a teacher in space. | 0:12:45 | 0:12:52 | |
The BBC followed the story. | 0:12:53 | 0:12:55 | |
Around the country, teachers started filling in the 48-page application form. | 0:12:57 | 0:13:03 | |
Among them was a social science teacher from Concord, New Hampshire, called Christa McAuliffe. | 0:13:03 | 0:13:09 | |
Christa called us one evening when she was at home in Concord | 0:13:09 | 0:13:14 | |
and she said, "I'm applying for this teacher in space programme." And we thought it was great. | 0:13:14 | 0:13:20 | |
In the first place, we really didn't really think she'd probably get a chance. | 0:13:20 | 0:13:25 | |
But it was a fun process to even apply | 0:13:25 | 0:13:29 | |
and to get involved in any way. | 0:13:29 | 0:13:32 | |
And so then, of course, the nearer she got to it, the more excited we all became. | 0:13:32 | 0:13:38 | |
In all, 11,000 teachers applied, but by mid-July there were 10 left in the contest. | 0:13:41 | 0:13:48 | |
And the winner, the teacher who will be going into space, | 0:13:48 | 0:13:52 | |
Christa McAuliffe. Where is...? Is that you? | 0:13:52 | 0:13:56 | |
Christa was the first choice of all seven judges. | 0:13:58 | 0:14:02 | |
She was described as a great communicator and composed under pressure. | 0:14:02 | 0:14:07 | |
For NASA, it was a public relations coup. | 0:14:07 | 0:14:10 | |
Overnight, Christa became a national celebrity, the most famous astronaut since Neil Armstrong. | 0:14:10 | 0:14:18 | |
You kids out there, do the best you can and get the best education you can. That's what it's all about. | 0:14:20 | 0:14:26 | |
So when I'm up in that Shuttle, I want everyone working real hard | 0:14:26 | 0:14:31 | |
to make education what it should be in this country! Thank you! | 0:14:31 | 0:14:35 | |
Christa went to Florida to train with the Shuttle crew and immerse herself in the life of an astronaut. | 0:14:37 | 0:14:43 | |
On January 28th, 1986, | 0:14:48 | 0:14:51 | |
Christa and the crew prepared for launch. | 0:14:51 | 0:14:55 | |
Amongst the crowds waiting for lift-off were her parents. | 0:14:57 | 0:15:02 | |
'Velocity 2,257 feet per second, altitude 4.3 nautical miles, down range distance 3 nautical miles.' | 0:15:16 | 0:15:22 | |
All seemed normal until 73 seconds into the launch. | 0:15:25 | 0:15:30 | |
- 'Challenger, go with throttle up.' - Roger, throttle up. | 0:15:30 | 0:15:34 | |
'One minute 15 seconds, velocity 2,900 feet per second, altitude 9 nautical miles... | 0:15:37 | 0:15:44 | |
'Flight Controller is here looking very carefully at the situation.' | 0:15:46 | 0:15:50 | |
He said, "I don't see her. I don't see the Shuttle." I said, "It's gone." And it was. | 0:15:54 | 0:16:00 | |
You just knew that it was... No, you knew it was... | 0:16:00 | 0:16:04 | |
You knew. | 0:16:04 | 0:16:07 | |
'Obviously, a major malfunction.' | 0:16:07 | 0:16:10 | |
I guess it must have been a minute before I realised | 0:16:10 | 0:16:14 | |
that the crew was either dead or in the process of dying. | 0:16:14 | 0:16:19 | |
I wanted to cry. | 0:16:19 | 0:16:21 | |
And everybody around me. We couldn't look at each other. | 0:16:21 | 0:16:25 | |
I just sat in stunned silence for the longest period of time. | 0:16:29 | 0:16:33 | |
Basically, faced the wall, sat in my chair | 0:16:33 | 0:16:37 | |
and tried to hold back my emotions. | 0:16:37 | 0:16:39 | |
- Go ahead. - 'Vehicle exploded.' | 0:16:42 | 0:16:45 | |
Copy. | 0:16:48 | 0:16:50 | |
We're awaiting word from any recovery forces in the down range field. | 0:17:04 | 0:17:09 | |
As a team of experts began to look for the cause of the accident, a disturbing story unfolded. | 0:17:09 | 0:17:16 | |
A full year before the launch, a design fault had been discovered in the solid rocket boosters. | 0:17:18 | 0:17:24 | |
These are the powerful rockets strapped to the fuel tank | 0:17:28 | 0:17:32 | |
which provide extra thrust during lift-off. | 0:17:32 | 0:17:36 | |
The rockets are built for NASA by a company called Morton Thiokol, | 0:17:39 | 0:17:43 | |
based in Utah, over 2,000 miles away from Cape Canaveral. | 0:17:43 | 0:17:48 | |
This distance led to a crucial design problem. | 0:17:50 | 0:17:54 | |
Rather than have the rocket engines | 0:17:55 | 0:17:58 | |
built near the Cape, which would have been the best way, and barged in, | 0:17:58 | 0:18:03 | |
they were built in... | 0:18:03 | 0:18:06 | |
out in the prairies and then they had to be freighted all the way. | 0:18:06 | 0:18:10 | |
That meant being built in segments, which meant you had the joints. | 0:18:10 | 0:18:14 | |
With joints you may have problems. | 0:18:14 | 0:18:17 | |
Each joint was sealed using a rubber O ring | 0:18:20 | 0:18:24 | |
which expanded during launch to plug the joint and seal in super-heated gas. | 0:18:24 | 0:18:30 | |
Failure would mean that hot gas would burst out like a blowtorch. | 0:18:32 | 0:18:36 | |
So, for safety, the designers built in a secondary O ring. | 0:18:39 | 0:18:44 | |
Two minutes into every launch, the solid rockets detach, fall back to Earth | 0:18:47 | 0:18:53 | |
and are collected for re-use. | 0:18:53 | 0:18:56 | |
In January, 1985, one of Morton Thiokol's engineers made a routine examination of a booster | 0:18:57 | 0:19:04 | |
that had been retrieved from the previous Shuttle launch. | 0:19:04 | 0:19:09 | |
What he found shocked him. | 0:19:09 | 0:19:11 | |
When those boosters were separated | 0:19:12 | 0:19:15 | |
and I inspected all six joints, two joints had been badly compromised. | 0:19:15 | 0:19:21 | |
On that January flight, the primary O rings in the compromised joints had failed. | 0:19:22 | 0:19:28 | |
Only the presence of the secondary O rings had prevented a catastrophic explosion. | 0:19:28 | 0:19:34 | |
When I saw that in real time in January of 1985, | 0:19:36 | 0:19:40 | |
I almost had cardiac arrest. I could not believe that we hadn't blown it up at that point in time. | 0:19:40 | 0:19:47 | |
The January launch had been the coldest ever. | 0:19:49 | 0:19:53 | |
Boisjoly concluded that the O rings had failed because the cold temperatures had made them brittle. | 0:19:53 | 0:19:59 | |
He reported back to his managers and NASA was informed. | 0:19:59 | 0:20:04 | |
NASA ordered a full review of the joints, but decided the O ring system was safe enough | 0:20:04 | 0:20:10 | |
to keep the Shuttle flying. | 0:20:10 | 0:20:13 | |
A year later, as Challenger waited on the launch pad, | 0:20:20 | 0:20:25 | |
conditions were even colder than they had been the previous January. | 0:20:25 | 0:20:29 | |
NASA consulted with engineers at Morton Thiokol | 0:20:33 | 0:20:38 | |
who were reluctant to give the go ahead for launch | 0:20:38 | 0:20:42 | |
in such cold temperatures. | 0:20:42 | 0:20:44 | |
But NASA was impatient. Its recent launches had been dogged by last-minute delays. | 0:20:45 | 0:20:51 | |
This launch was already four days behind schedule. | 0:20:51 | 0:20:55 | |
In a last-minute tele-conference, under pressure from NASA, | 0:20:59 | 0:21:04 | |
Morton Thiokol withdrew its opposition to the launch. | 0:21:04 | 0:21:08 | |
But it WAS too cold | 0:21:11 | 0:21:13 | |
and in one of the joints both O rings failed. | 0:21:13 | 0:21:18 | |
The vehicle broke up into hundreds of fragments. | 0:21:24 | 0:21:28 | |
The crew compartment plummeted towards the ocean, | 0:21:31 | 0:21:35 | |
but at seven miles up, it took nearly 2.5 minutes to descend. | 0:21:35 | 0:21:39 | |
Later, NASA calculated that some of the crew might have been conscious on descent | 0:21:39 | 0:21:45 | |
and that all were probably alive. | 0:21:45 | 0:21:47 | |
The seven astronauts perished when the stricken craft hit the sea at more than 200 miles an hour. | 0:21:52 | 0:21:58 | |
The destruction of Challenger and its brave crew greatly affected America. | 0:22:02 | 0:22:08 | |
The media appetite for Christa McAuliffe meant the nation knew this Shuttle crew like no other. | 0:22:08 | 0:22:14 | |
Commander Dick Scobee. | 0:22:17 | 0:22:19 | |
Pilot Mike Smith. | 0:22:19 | 0:22:21 | |
Dr Judith Resnik. | 0:22:22 | 0:22:25 | |
Dr Ron McNair. | 0:22:26 | 0:22:28 | |
Lieutenant Colonel Ellison Onizuka. | 0:22:28 | 0:22:31 | |
Captain Greg Jarvis. | 0:22:31 | 0:22:33 | |
And teacher Christa McAuliffe. | 0:22:33 | 0:22:36 | |
The tragedy grounded the Shuttle | 0:22:53 | 0:22:56 | |
and paralysed NASA's manned space programme. | 0:22:56 | 0:23:00 | |
But Americans could not give up the dream of exploring space. | 0:23:00 | 0:23:05 | |
NASA set about a major redesign. | 0:23:05 | 0:23:07 | |
Clearly, the solid rockets would have to be re-engineered, | 0:23:08 | 0:23:12 | |
but NASA also seized the chance to make a host of other safety improvements. | 0:23:12 | 0:23:18 | |
The astronauts appointed to fly the next mission followed every part of the redesign closely. | 0:23:21 | 0:23:28 | |
Morton Thiokol, Utah. | 0:23:35 | 0:23:37 | |
The first in a series of tests | 0:23:40 | 0:23:43 | |
of the redesigned solid rocket. | 0:23:43 | 0:23:45 | |
The critical path begins. | 0:23:45 | 0:23:48 | |
The crew is here. | 0:23:48 | 0:23:50 | |
Their success and, ultimately, their lives depend on the work of many. | 0:23:50 | 0:23:54 | |
We're obviously interested in witnessing the test firing. It's step one, as was said earlier, | 0:23:57 | 0:24:03 | |
-in getting us back into manned spaceflight. -In the solids, two rubbery O ring seals | 0:24:03 | 0:24:09 | |
were supposed to stop a leak of hot gas. Now they're experimenting with a third O ring. | 0:24:09 | 0:24:15 | |
This was its first test. | 0:24:15 | 0:24:18 | |
Six, five, four, | 0:24:18 | 0:24:20 | |
three, two, one. | 0:24:20 | 0:24:23 | |
Fire! | 0:24:23 | 0:24:25 | |
The ascent phase of this mission will be like a test flight. We have new solid rocket motors, | 0:24:27 | 0:24:33 | |
the motors themselves have been greatly re-engineered, | 0:24:33 | 0:24:37 | |
including parts of the booster. | 0:24:37 | 0:24:40 | |
And all those things together, this will be the first flight test. | 0:24:40 | 0:24:45 | |
Landing and stopping can be just as chancy as lift-off in this business. | 0:24:52 | 0:24:57 | |
June last year. They roll the Shuttle slowly into a safety net. | 0:24:57 | 0:25:02 | |
And also last summer, they finally had time to improve the spacecraft's unreliable brakes and tyres. | 0:25:03 | 0:25:10 | |
'There are always going to be problems and glitches. That's what you expect. | 0:25:31 | 0:25:36 | |
'Certainly all of us as crew are aware that this is a risky business | 0:25:36 | 0:25:41 | |
'and the crew of the Challenger was no different. All we can do now is regroup and rebuild | 0:25:41 | 0:25:48 | |
'and press on. We have to live with what happened and keep going.' | 0:25:48 | 0:25:53 | |
We designed the Space Shuttle in the '70s without an escape system. | 0:25:53 | 0:25:58 | |
And I think | 0:25:59 | 0:26:01 | |
everyone realises that was a mistake. | 0:26:01 | 0:26:03 | |
I don't think we'll ever see a rocket built again without an escape system. | 0:26:03 | 0:26:08 | |
Hurricane Mesa, Utah. | 0:26:11 | 0:26:14 | |
They're using a dummy to test a new escape system. | 0:26:15 | 0:26:19 | |
The tractor rocket concept is an adaptation of the ejector seats used in military jet aircraft, | 0:26:19 | 0:26:25 | |
only here the astronauts will be pulled, not pushed to safety. | 0:26:25 | 0:26:30 | |
The engineers say it is a tested system with a 90% success rate. | 0:26:30 | 0:26:35 | |
Pinky has come to watch. | 0:26:36 | 0:26:38 | |
The most thing that goes through my mind is I hope I never do it. | 0:26:38 | 0:26:43 | |
The orbiter has to be flying so the vehicle has to be intact and flying through the atmosphere. | 0:26:43 | 0:26:49 | |
We couldn't bail out when the engines were running or if we lost control | 0:26:49 | 0:26:54 | |
or if the vehicle was badly damaged. This system would not work for that. | 0:26:54 | 0:26:59 | |
The system provides a narrow margin of safety at best. | 0:27:23 | 0:27:27 | |
Escape is only possible under limited circumstances. | 0:27:27 | 0:27:31 | |
Privately, some astronauts tell you the whole thing is a sop to public anxiety. | 0:27:31 | 0:27:37 | |
'Three, two, one.' | 0:27:41 | 0:27:44 | |
Whatever NASA's motives, an escape system was eventually included, | 0:27:44 | 0:27:49 | |
along with a further 345 modifications. | 0:27:49 | 0:27:53 | |
Only then was the Shuttle considered safe enough to go back into space. | 0:27:53 | 0:27:59 | |
CHEERING AND APPLAUSE | 0:28:03 | 0:28:06 | |
For over two years now... | 0:28:09 | 0:28:12 | |
..each one of us here tonight has had a dream | 0:28:13 | 0:28:16 | |
that one day | 0:28:16 | 0:28:19 | |
a Shuttle would once again make its way to the launch pad to launch Americans into space. | 0:28:19 | 0:28:25 | |
'Start. Three, two, one, zero. | 0:28:26 | 0:28:30 | |
'And lift off! Lift off. | 0:28:30 | 0:28:33 | |
'Americans return to space as Discovery clears the tower.' | 0:28:33 | 0:28:38 | |
The Challenger disaster had shown conclusively that space flight was not a routine activity | 0:28:38 | 0:28:44 | |
and the refit had cost over 20 billion | 0:28:44 | 0:28:47 | |
so the Shuttle would never again be described as cheap. | 0:28:47 | 0:28:52 | |
It needed to do something spectacular to prove that it was no white elephant. | 0:28:52 | 0:28:58 | |
Soon it got its chance. | 0:28:58 | 0:29:00 | |
In 1984, Horizon reported on plans to build the world's most ambitious telescope. | 0:29:02 | 0:29:09 | |
The Hubble Space Telescope will see much further into the universe | 0:29:10 | 0:29:14 | |
than has ever been possible before. | 0:29:14 | 0:29:16 | |
Freed from the obscuring effects of the atmosphere, | 0:29:16 | 0:29:19 | |
the optical system at the heart of the spacecraft will enable the telescope's mirror | 0:29:19 | 0:29:25 | |
to resolve details ten times better than any instrument on the ground. | 0:29:25 | 0:29:29 | |
When it's installed in the space telescope, | 0:29:29 | 0:29:32 | |
this mirror is set to revolutionise our vision of the universe. | 0:29:32 | 0:29:36 | |
It will allow us to search the stars for other solar systems that may harbour life | 0:29:36 | 0:29:41 | |
and closer to home, we will be able to study the planets | 0:29:41 | 0:29:44 | |
with a resolution equivalent to the Voyager probe only a few days away from its closest encounter. | 0:29:44 | 0:29:51 | |
In purely numerical terms, | 0:29:51 | 0:29:54 | |
it's as big or a bigger leap | 0:29:54 | 0:29:57 | |
than occurred when Galileo first used a telescope, | 0:29:57 | 0:30:01 | |
rather than the naked eye, to look at the universe and look at stars. | 0:30:01 | 0:30:06 | |
We know for sure that every area of astronomy will be very profoundly affected. | 0:30:06 | 0:30:11 | |
The space telescope will benefit from the presence of man in space, | 0:30:11 | 0:30:15 | |
both to maintain its instruments and to carry out repairs if it breaks down. | 0:30:15 | 0:30:20 | |
No-one had any idea how soon a breakdown would happen. | 0:30:20 | 0:30:25 | |
In 1990, the Hubble Space Telescope was deployed into orbit. | 0:30:31 | 0:30:36 | |
But when the telescope was used for the first time, | 0:30:38 | 0:30:41 | |
the Hubble astronomers received a profound shock. | 0:30:41 | 0:30:45 | |
Instead of the pin-sharp pictures they were expecting... | 0:30:47 | 0:30:50 | |
..they got these smudges, | 0:30:52 | 0:30:55 | |
barely better than ground-based telescopes could produce. | 0:30:55 | 0:31:00 | |
The problem was the enormous mirror now seated at the heart of the telescope. | 0:31:00 | 0:31:06 | |
It couldn't focus light perfectly because it had been polished a fraction out of shape. | 0:31:06 | 0:31:12 | |
Decades of work, billions of dollars and the hopes of a generation of astronomers | 0:31:13 | 0:31:19 | |
had been destroyed. | 0:31:19 | 0:31:21 | |
Once again, NASA was under attack. | 0:31:21 | 0:31:25 | |
Have we ended up with degraded science or cancelled science? | 0:31:28 | 0:31:33 | |
If this aberration was such a textbook case, | 0:31:33 | 0:31:36 | |
why wasn't it caught on the ground? | 0:31:36 | 0:31:38 | |
What are the possible things that could have happened? | 0:31:38 | 0:31:42 | |
How many straws are there on this camel's back? | 0:31:42 | 0:31:45 | |
It would be dishonest to say the mood of the scientist is very happy right now. | 0:31:45 | 0:31:50 | |
We're all frustrated, obviously. And I'll stop there. | 0:31:50 | 0:31:54 | |
'The press conference where we announced Hubble's spherical aberration | 0:31:54 | 0:31:59 | |
'was by far the worst day of my life. I was saying we messed it up.' | 0:31:59 | 0:32:03 | |
So at that point, I was convinced the programme was dead. | 0:32:03 | 0:32:08 | |
People began to disintegrate. | 0:32:11 | 0:32:13 | |
Some had to be taken out by guards | 0:32:13 | 0:32:16 | |
to rehabilitation centres for drugs and alcohol. | 0:32:16 | 0:32:19 | |
The astronomy community was tearing itself apart. | 0:32:19 | 0:32:22 | |
I personally felt like killing somebody | 0:32:22 | 0:32:25 | |
because having invested 12 years of my life up to that point | 0:32:25 | 0:32:29 | |
in this project, and seeing that this was a really major disaster for us... | 0:32:29 | 0:32:34 | |
..you know, the reaction is that one. | 0:32:35 | 0:32:38 | |
Everybody began blaming everybody about how could this have happened, how could such a mistake be made. | 0:32:38 | 0:32:45 | |
It was a very bad time. | 0:32:45 | 0:32:47 | |
The Hubble had to be saved at all costs. | 0:32:48 | 0:32:51 | |
Scientists and engineers began desperately trying to find a solution to its problem. | 0:32:56 | 0:33:02 | |
..which we've listed as mechanical correction or deformation. | 0:33:04 | 0:33:08 | |
'We formed a committee, a strategy panel to come up with ideas and about 30 suggestions came up.' | 0:33:08 | 0:33:15 | |
Number 85... | 0:33:15 | 0:33:17 | |
'We put everything on the table,' | 0:33:18 | 0:33:21 | |
even the craziest idea, to see what we could do to fix the problem. | 0:33:21 | 0:33:25 | |
This is replacement of the secondary, just as a straight correction. | 0:33:26 | 0:33:31 | |
They ranged from the shuttle bringing the spacecraft back to Earth | 0:33:31 | 0:33:35 | |
and replacing the primary mirror... | 0:33:35 | 0:33:37 | |
..to send astronauts up and actually, inside the tube of the telescope, | 0:33:37 | 0:33:43 | |
and do something to the optics, which was crazy, but we discussed it. | 0:33:43 | 0:33:48 | |
A full aperture correction... | 0:33:48 | 0:33:50 | |
There were ideas even to try to re-coat or change the shape of the primary on orbit with heaters. | 0:33:50 | 0:33:56 | |
To put a mirror in front of the telescope which was slightly bent, so you'd have the correction in it. | 0:33:56 | 0:34:02 | |
Trying to move the instruments back by several metres. | 0:34:02 | 0:34:05 | |
-Front end of the telescope... -A report... -I don't have a picture. | 0:34:05 | 0:34:09 | |
And so on and so forth. | 0:34:09 | 0:34:12 | |
Among the proposals was the ingenious solution, | 0:34:17 | 0:34:21 | |
an instrument that would match the error in the mirror in reverse and cancel it out. | 0:34:21 | 0:34:28 | |
This optical fix was called the Corrective Optics Space Telescope Axial Replacement, | 0:34:28 | 0:34:34 | |
or COSTAR for short. | 0:34:34 | 0:34:36 | |
There was no way of knowing whether COSTAR would actually work. | 0:34:42 | 0:34:46 | |
But hopes of saving the Hubble now lay with this intricate design. | 0:34:46 | 0:34:51 | |
Plans for an ambitious repair mission began to take shape. | 0:34:56 | 0:35:00 | |
Everybody knew what happened when we failed with Hubble the first time | 0:35:00 | 0:35:04 | |
and everybody knew the stakes were very high. A second failure would be unforgivable. | 0:35:04 | 0:35:09 | |
I mean, there were words that were even... | 0:35:09 | 0:35:12 | |
Such as, "This is the measure of NASA. | 0:35:12 | 0:35:15 | |
"This mission is the measure. This mission defines... Is there a NASA?" | 0:35:15 | 0:35:20 | |
There was enough pressure to just do this mission, | 0:35:20 | 0:35:23 | |
but now suddenly, instead of the future of Hubble, | 0:35:23 | 0:35:27 | |
the future of your entire space programme is depending on success. | 0:35:27 | 0:35:31 | |
NASA was relying on the Shuttle and its crew. | 0:35:35 | 0:35:40 | |
Along with COSTAR, they would also have to put in a new camera and make a host of other repairs. | 0:35:40 | 0:35:46 | |
It would mean a record 35 hours of space walks over five days. | 0:35:47 | 0:35:52 | |
By December 1993, they were ready to go. | 0:35:53 | 0:35:57 | |
'Houston, we are inspired, we are ready. Let's go fix this thing.' | 0:35:58 | 0:36:03 | |
The astronauts got to work. | 0:36:04 | 0:36:07 | |
They knew the tiniest mistake could be catastrophic for the mission. | 0:36:08 | 0:36:12 | |
'Four, five, six. | 0:36:12 | 0:36:15 | |
'You're clear in. You got it.' | 0:36:15 | 0:36:18 | |
'Look at that baby! | 0:36:18 | 0:36:21 | |
'Beautiful, spanking-new WF/PC.' | 0:36:22 | 0:36:24 | |
First came the delicate task of putting in the new camera. | 0:36:26 | 0:36:30 | |
Later, COSTAR was manoeuvred into position with less than an inch of clearance on either side. | 0:36:35 | 0:36:41 | |
'Would you like to see it? | 0:36:44 | 0:36:47 | |
'Good work, guys. | 0:36:47 | 0:36:49 | |
'Whoo!' | 0:36:49 | 0:36:51 | |
The astronauts had completed every task to perfection. | 0:36:56 | 0:37:00 | |
Now it was over to the scientists on the ground. | 0:37:00 | 0:37:03 | |
Then it dawned on us - wait a minute, this is only half the job. | 0:37:05 | 0:37:08 | |
Will that camera work? Will COSTAR work? | 0:37:08 | 0:37:11 | |
Did we get the right prescription for those glasses to put on Hubble? | 0:37:11 | 0:37:15 | |
Two weeks later, it was time to put the repairs to the test. | 0:37:23 | 0:37:28 | |
First, they tried out the new camera. | 0:37:29 | 0:37:32 | |
'As usual, everything on Hubble happens at night for some reason | 0:37:33 | 0:37:37 | |
'and the first images were scheduled to come down at 1am. | 0:37:37 | 0:37:41 | |
'The whole camera team were around the computer screen. | 0:37:41 | 0:37:44 | |
'The image slowly built, so you see the bright things first and right in the centre was a very bright star.' | 0:37:44 | 0:37:51 | |
CHEERING | 0:37:51 | 0:37:53 | |
-One bright... -Right there. | 0:37:53 | 0:37:55 | |
CHEERING We did it. | 0:37:55 | 0:37:57 | |
Wait, wait, wait. | 0:37:57 | 0:37:59 | |
-Bring it up. -Come on, come on, come on. | 0:38:01 | 0:38:05 | |
Those are actually stars. Those are real stars. | 0:38:06 | 0:38:09 | |
LAUGHTER | 0:38:09 | 0:38:12 | |
CORK POPS | 0:38:12 | 0:38:15 | |
CHEERING AND APPLAUSE | 0:38:15 | 0:38:17 | |
'Everyone was thrilled. There were cheers.' | 0:38:18 | 0:38:22 | |
It was black and white. | 0:38:22 | 0:38:24 | |
Before, we didn't know, and afterwards, we knew. We had it. | 0:38:24 | 0:38:28 | |
Astronomers saw in spectacular detail for the first time where stars are born... | 0:38:38 | 0:38:43 | |
..how they die... | 0:38:47 | 0:38:49 | |
..and back in time to the origins of the universe. | 0:38:52 | 0:38:56 | |
Without the Shuttle, it wouldn't have been possible to get these images from Hubble. | 0:38:59 | 0:39:05 | |
This incredible success was a major milestone for NASA. | 0:39:10 | 0:39:15 | |
Hubble was saved and the Shuttle was back in the nation's good books. | 0:39:16 | 0:39:21 | |
But the rescue mission would also pave the way for a project of even more extraordinary ambition. | 0:39:22 | 0:39:29 | |
Ideas for a futuristic space station had been around for decades. | 0:39:34 | 0:39:39 | |
Many of them inhabited the murky world between science fact and fiction. | 0:39:39 | 0:39:44 | |
But NASA had firm plans to create one for real. | 0:39:45 | 0:39:49 | |
In 1984, President Reagan revealed to the world and to Mrs Thatcher | 0:39:53 | 0:39:58 | |
models of a permanent, orbital space station. | 0:39:58 | 0:40:01 | |
One of its great... | 0:40:01 | 0:40:03 | |
But the plans stalled as NASA scientists found it impossible | 0:40:03 | 0:40:07 | |
to decide what that space station should be like. | 0:40:07 | 0:40:11 | |
The Russians meanwhile had no such problems. | 0:40:13 | 0:40:17 | |
They had had Salyut 1 in orbit since 1971. | 0:40:18 | 0:40:22 | |
And they had followed this success by building the even more complex Mir space station. | 0:40:24 | 0:40:31 | |
Meanwhile, by 1993, | 0:40:34 | 0:40:36 | |
the US had spent an alarming eight billion dollars | 0:40:36 | 0:40:40 | |
on countless re-designs without building a single piece of hardware. | 0:40:40 | 0:40:45 | |
Congress was threatening to pull the plug. | 0:40:45 | 0:40:48 | |
But something had happened that would give the US space station a reprieve. | 0:40:52 | 0:40:58 | |
The old enemy, the Soviet Union, had collapsed. | 0:41:02 | 0:41:06 | |
Russia's once spectacular space programme was almost bankrupt. | 0:41:06 | 0:41:10 | |
In the new era of peace between nations, | 0:41:10 | 0:41:14 | |
NASA's chief administrator had an idea. | 0:41:14 | 0:41:18 | |
Dan Goldin invited the Russians to collaborate. | 0:41:19 | 0:41:23 | |
This is a historic moment. I'm just very excited. Mr Koptev, I want to give you a hug. | 0:41:23 | 0:41:29 | |
APPLAUSE | 0:41:29 | 0:41:31 | |
It was a hug that would get Shuttle astronauts on to Mir. | 0:41:31 | 0:41:35 | |
I'm Jerry Linenger, of course, and I'm in the base block | 0:41:35 | 0:41:40 | |
where you see most pictures that come out of Mir. | 0:41:40 | 0:41:43 | |
This is where we gather to eat... | 0:41:43 | 0:41:45 | |
Jerry Linenger was the fourth American astronaut to join the Russians on Mir. | 0:41:45 | 0:41:50 | |
This is the commander's station. Vasily says hello to everybody... | 0:41:50 | 0:41:54 | |
'I had a sense that I was doing something good for the country. | 0:41:54 | 0:41:58 | |
'I was about 14 when I saw the moon landings and I said, "I'd like to do that some day."' | 0:41:58 | 0:42:03 | |
You get lucky sometimes. | 0:42:03 | 0:42:06 | |
Mir has been lived in almost continuously since she was launched in 1986. | 0:42:06 | 0:42:13 | |
SPEAKS IN RUSSIAN | 0:42:14 | 0:42:16 | |
But life on Mir was far from perfect. | 0:42:36 | 0:42:39 | |
The ageing space station was falling apart. | 0:42:39 | 0:42:42 | |
Oxygen generators repeatedly broke down. | 0:42:42 | 0:42:45 | |
There were daily chemical leaks. Even the toilet malfunctioned. | 0:42:45 | 0:42:49 | |
We had many system failures and they were in need of your constant attention. | 0:42:51 | 0:42:57 | |
And many days I'd start an experiment in the morning to get it running, | 0:42:57 | 0:43:01 | |
then I'd run over to help hacksaw through a pipe and plug the ends, then run back to my experiment. | 0:43:01 | 0:43:08 | |
Most dangerous of all, in the sixth week of Linenger's stay, | 0:43:10 | 0:43:14 | |
a fire broke out. | 0:43:14 | 0:43:16 | |
I looked down the passageway and I could see a very large flame... | 0:43:18 | 0:43:24 | |
..bursting out of the canister, | 0:43:25 | 0:43:28 | |
smoke billowing out, and I knew we had a big problem. | 0:43:28 | 0:43:32 | |
The fire was blocking the exit to one of the two escape ships. | 0:43:32 | 0:43:37 | |
If the crew couldn't put it out, some of them would be left behind to die. | 0:43:37 | 0:43:43 | |
Cosmonaut Valery Korzun finally put out the fire, but smoke continued to fill Mir. | 0:43:45 | 0:43:51 | |
Linenger was relieved when his 19-week stay in orbit was over. | 0:44:02 | 0:44:07 | |
Watching the Shuttle coming up underneath us at 18,000 miles an hour | 0:44:08 | 0:44:13 | |
was the most beautiful sight in the world. | 0:44:13 | 0:44:17 | |
I was ready to go home | 0:44:26 | 0:44:28 | |
and for me, it was a moment of triumph. | 0:44:28 | 0:44:31 | |
The Shuttle's there. I'd made it. | 0:44:31 | 0:44:34 | |
And when the Shuttle came and docked, it was glorious. | 0:44:34 | 0:44:38 | |
Despite its faults, the Russian collaboration was a turning point in NASA's plans for a space station. | 0:44:54 | 0:45:00 | |
They now had valuable data on how humans reacted to long stays in space. | 0:45:01 | 0:45:07 | |
And it had secured co-operation for an International Space Station. | 0:45:07 | 0:45:12 | |
'T minus 60 seconds and counting. | 0:45:13 | 0:45:15 | |
'Everything looking good for launch of Space Shuttle Endeavour from Kennedy Space Center. | 0:45:15 | 0:45:20 | |
'T minus 50 seconds.' | 0:45:20 | 0:45:22 | |
Now that the Shuttle had smoothed the path for the new space station, it was sent to build it. | 0:45:22 | 0:45:28 | |
'Ten, nine, eight, | 0:45:28 | 0:45:31 | |
'seven, six, five, | 0:45:31 | 0:45:33 | |
'four, three, | 0:45:33 | 0:45:36 | |
'two, one, zero | 0:45:36 | 0:45:39 | |
'and lift-off of Endeavour, | 0:45:39 | 0:45:42 | |
'going where East and West do meet at the International Space Station.' | 0:45:42 | 0:45:46 | |
CHEERING | 0:45:46 | 0:45:48 | |
'Endeavour, Houston. Congratulations to all the members of the crew. It's a beautiful sight.' | 0:45:53 | 0:45:59 | |
The space station began a new era in the colonisation of space. | 0:46:06 | 0:46:10 | |
Nations which were sworn enemies only years before worked together | 0:46:10 | 0:46:14 | |
to build a truly international machine. | 0:46:14 | 0:46:18 | |
In the first five years of construction, the Shuttle made 16 trips to the space station, | 0:46:27 | 0:46:33 | |
but it was slow work. | 0:46:33 | 0:46:35 | |
By 2002, NASA was under pressure to do more with the Shuttle | 0:46:35 | 0:46:39 | |
than just use it as a ferry to the ISS. | 0:46:39 | 0:46:42 | |
Its answer was to launch a scientific study mission, | 0:46:42 | 0:46:47 | |
though the lessons learned would have more grim implications. | 0:46:47 | 0:46:52 | |
Columbia, the oldest craft in the fleet, | 0:46:57 | 0:47:01 | |
was fitted with a state-of-the-art space laboratory. | 0:47:01 | 0:47:05 | |
This mission would be the first to use it. | 0:47:10 | 0:47:13 | |
It meant that for NASA and the seven astronauts on board, there was a lot at stake. | 0:47:15 | 0:47:20 | |
And for 16 days, everything went according to plan. | 0:47:28 | 0:47:32 | |
The team worked round the clock on their experiments. | 0:47:32 | 0:47:35 | |
If we didn't work 24 hours a day, we'd be giving up eight hours of sleep time | 0:47:35 | 0:47:41 | |
that could be used for science. | 0:47:41 | 0:47:43 | |
So the intent is to pack each minute of the 24 hours | 0:47:43 | 0:47:47 | |
that we're on orbit with science. | 0:47:47 | 0:47:49 | |
After two weeks in space, the science mission was declared a triumph. | 0:48:01 | 0:48:07 | |
All that was left was to gather their results, | 0:48:07 | 0:48:11 | |
re-enter the Earth's atmosphere and come home. | 0:48:11 | 0:48:15 | |
The entries are a bit better than the launch. It's a bit quieter. | 0:48:15 | 0:48:19 | |
It's not quite as violent and you can enjoy it a little bit. | 0:48:19 | 0:48:22 | |
At the end of 16 days, we'll come back and land, | 0:48:23 | 0:48:27 | |
slowing from 17,000-plus miles per hour down to 200-plus miles per hour. | 0:48:27 | 0:48:32 | |
We're hoping our commander will make a smooth landing and the mission will be over. | 0:48:32 | 0:48:37 | |
ALL: Bye-bye! | 0:48:49 | 0:48:52 | |
On the 1st of February, 2003, | 0:49:03 | 0:49:05 | |
Columbia began its descent back to Earth. | 0:49:05 | 0:49:09 | |
As the Shuttle raced over the Pacific towards the US, | 0:49:14 | 0:49:19 | |
the crew put on their suits, preparing themselves for a routine landing. | 0:49:19 | 0:49:24 | |
'Columbia's a beautiful ship, performing magnificently.' | 0:49:25 | 0:49:29 | |
At 8.44am, Columbia re-entered the Earth's atmosphere. | 0:49:29 | 0:49:34 | |
Still everything appeared normal. | 0:49:36 | 0:49:38 | |
'There might be some plasma now.' | 0:49:44 | 0:49:48 | |
-GNC, Flight? -Flight, GNC. | 0:49:59 | 0:50:01 | |
Everything look good to you? Control and rates and everything is nominal? | 0:50:01 | 0:50:06 | |
-Control's been stable. We have good trims. I don't see anything out of the ordinary. -OK. | 0:50:06 | 0:50:11 | |
'It's noisy in there.' | 0:50:11 | 0:50:14 | |
Then, just 22 minutes before touchdown at 8.54 in the morning, | 0:50:16 | 0:50:21 | |
there was an unusual reading from one of the Shuttle's many sensors. | 0:50:21 | 0:50:25 | |
-Flight, MMACS. -Go ahead, MMACS. | 0:50:25 | 0:50:28 | |
I've just lost four separate temperature transducers on the left side of the vehicle, | 0:50:28 | 0:50:33 | |
hydraulic return temperatures. | 0:50:33 | 0:50:35 | |
Columbia, Houston, comm check. | 0:50:36 | 0:50:39 | |
Columbia, Houston, UHF comm check. | 0:50:48 | 0:50:52 | |
TOTAL SILENCE | 0:50:52 | 0:50:54 | |
Columbia, Houston, UHF comm check. | 0:51:06 | 0:51:09 | |
Columbia, Houston, UHF comm check. | 0:51:13 | 0:51:16 | |
At 9.16, the truth dawned on Mission Control. | 0:51:21 | 0:51:24 | |
The Space Shuttle had been lost. | 0:51:25 | 0:51:28 | |
61 kilometres above the ground, | 0:51:31 | 0:51:34 | |
the Shuttle had disintegrated, killing all seven people on board. | 0:51:34 | 0:51:38 | |
Once again, NASA found itself asking the terrible question, | 0:51:38 | 0:51:43 | |
"What had gone wrong with the Shuttle?" | 0:51:43 | 0:51:46 | |
Within minutes of the disaster, | 0:51:49 | 0:51:53 | |
NASA's investigators had swung into action. | 0:51:53 | 0:51:56 | |
They began to concentrate on an event that had happened | 0:51:57 | 0:52:01 | |
at the very beginning of Columbia's voyage. | 0:52:01 | 0:52:04 | |
It was something to do | 0:52:05 | 0:52:07 | |
with the Shuttle's large, orange fuel tank. | 0:52:07 | 0:52:10 | |
During this particular launch, | 0:52:17 | 0:52:20 | |
it appears that a large chunk of this spray-on foam broke off | 0:52:20 | 0:52:25 | |
at the place where the Shuttle attaches to the tank up by under the nose. | 0:52:25 | 0:52:30 | |
This video shows a piece of orange insulating foam falling off the fuel tank | 0:52:32 | 0:52:38 | |
81 seconds into the flight. | 0:52:38 | 0:52:41 | |
The chunk appears to be about the size of a briefcase, maybe a little bit bigger, | 0:52:45 | 0:52:50 | |
and weighs somewhere around two and a half to three pounds. | 0:52:50 | 0:52:54 | |
The foam had struck and damaged the wing's leading edge, | 0:52:57 | 0:53:02 | |
an area covered by ultra-strong, grey, carbon-carbon panels designed to be indestructible. | 0:53:02 | 0:53:08 | |
The leading edge, the reinforced carbon-carbon, is hard, like a rock. | 0:53:16 | 0:53:21 | |
And for foam to have damaged the RCC enough | 0:53:21 | 0:53:27 | |
to cause an accident still surprises me. | 0:53:27 | 0:53:30 | |
But tests showed that a foam block could indeed puncture the tiles, | 0:53:37 | 0:53:42 | |
inevitably leading to a catastrophic failure of the heat shield. | 0:53:42 | 0:53:46 | |
Some felt that NASA could have saved Columbia and its crew. | 0:53:50 | 0:53:54 | |
That they could have been brought back to Earth alive. | 0:53:57 | 0:54:01 | |
NASA knew a chunk of foam had hit the orbiter during launch. | 0:54:05 | 0:54:10 | |
It could have used a telescope on Earth to examine the Shuttle in orbit | 0:54:12 | 0:54:17 | |
to see if any tiles had been damaged. | 0:54:17 | 0:54:20 | |
Or it could have asked the astronauts to open a hatch and take a look. | 0:54:22 | 0:54:28 | |
Once it had discovered the damage, | 0:54:33 | 0:54:36 | |
NASA could have asked the crew to bring the Shuttle in at a different angle, favouring the undamaged wing. | 0:54:36 | 0:54:42 | |
You might have led sort of sideways, | 0:54:46 | 0:54:49 | |
crabbing the Shuttle in, scorching the good side, | 0:54:49 | 0:54:52 | |
protecting the damaged side. | 0:54:52 | 0:54:55 | |
But even if this wasn't possible, | 0:55:00 | 0:55:03 | |
NASA still had another much more ambitious option - | 0:55:03 | 0:55:07 | |
a rescue mission. | 0:55:07 | 0:55:10 | |
At the time of the disaster, the Shuttle Atlantis was being prepared for launch. | 0:55:14 | 0:55:20 | |
NASA could have sent it up to rescue the crew within weeks. | 0:55:20 | 0:55:24 | |
A rescue mission like this would have been a major achievement for NASA | 0:55:30 | 0:55:35 | |
and a public relations coup, | 0:55:35 | 0:55:38 | |
proof that they had the expertise and skills to do remarkable things. | 0:55:38 | 0:55:43 | |
The tragedy is none of these options was even considered. | 0:55:44 | 0:55:50 | |
Columbia was a powerful reminder that manned space flight is inherently dangerous. | 0:55:57 | 0:56:03 | |
But America was adamant that the names of the dead should be honoured | 0:56:04 | 0:56:08 | |
and that the programme must continue. | 0:56:08 | 0:56:11 | |
Another re-design began. | 0:56:13 | 0:56:16 | |
The foam insulation on the fuel tank was improved | 0:56:16 | 0:56:20 | |
and systems were put in place to check for tile damage in orbit. | 0:56:20 | 0:56:24 | |
Two years later, a new crew prepared to return to space | 0:56:27 | 0:56:31 | |
on the 114th flight in the Shuttle fleet's career. | 0:56:31 | 0:56:35 | |
But even as the Shuttle orbited, NASA had already decided it was time to call it a day. | 0:56:36 | 0:56:42 | |
Its flawed, compromised design means there are just too many things that can go wrong. | 0:56:43 | 0:56:49 | |
Since 2003, there has been a collective crossing of fingers every time a Shuttle has launched | 0:56:49 | 0:56:56 | |
and every time one has returned safely. | 0:56:56 | 0:57:00 | |
With the end of the programme, that anxiety is over. | 0:57:00 | 0:57:03 | |
But what a ride the Shuttle has given us! | 0:57:05 | 0:57:09 | |
The programme has launched more people into space than all previous American space missions combined | 0:57:10 | 0:57:17 | |
and allowed humans to continue to reach out beyond our planet. | 0:57:17 | 0:57:22 | |
The Hubble Space Telescope has given us a view on the dawn of time and the birth of stars. | 0:57:27 | 0:57:34 | |
The construction of the International Space Station has shown what can be achieved | 0:57:36 | 0:57:42 | |
when once hostile nations collaborate. | 0:57:42 | 0:57:45 | |
And Earth observations have given us valuable insights into the changing face of our home. | 0:57:49 | 0:57:55 | |
But perhaps more than anything, the Shuttle has shown us what we are capable of. | 0:58:01 | 0:58:07 | |
It has provided us with a stepping stone to the missions of the future. | 0:58:07 | 0:58:11 | |
Where that future takes us will be up to the next generation | 0:58:11 | 0:58:15 | |
of engineers, politicians and scientists | 0:58:15 | 0:58:18 | |
who take on the great endeavour of space exploration. | 0:58:18 | 0:58:22 | |
Subtitles by Subtext for Red Bee Media Ltd 2011 | 0:58:47 | 0:58:51 | |
Email [email protected] | 0:58:51 | 0:58:54 |