January 28, 1986

[theshark8777]

I just saw a commercial that CNN Presents is doing a story on Christa McAuliff this weekend. Then I realzied it has been 20 years since the space shuttle Challenger tragedy. It doesn't seem that long, I can still remember being at lunch in third grade and a teacher coming in and telling us about it. For some reason we didn't watch it like a lot of schools did. This was my generation's JFK assassination, at least until that sad day on 9/11 So how many other people here remember that day 20 years ago? Where were you, and how did you find out?

PS: here is the CNN presents summary:

Christa McAuliffe, chosen to be America's first teacher in space, was an outspoken and opinionated woman who refused to be scripted by her government handlers. CNN Presents tells the real story of McAuliffe through her family, who for the first time share their memories and the private pain beneath the public tragedy of her death aboard the space shuttle Challenger.

[Penny Lane]

OMG! I cannot believe that it has been that long ago! I cannot remember where I was but I certainly do remember it! That was quite a day! RIP Christa and to all of the crew!

[Ireneparalegal]

Yes, I remember that day too well. I was 21 and seen it live. It was horrible and one of those days that you know where you were when it happened. That awful feeling came over me when the Columbia also exploded. So sad and tragic.

[PZelda]

I wasn't old enough to remember Challenger, but I was around. I was still a baby at the time, five months old. It's hard to believe that on Saturday, it will have been 20 years ago.

[Nighthawk76]

I remember this terrible tragedy only too well. I was in 4th grade and when our teacher came back from lunch she told us that the space shuttle and exploded.

[Steve M.]

I remember that day. It was snowing, I was in college, and as I went into the campus center, someone said, "Did you hear about the space shuttle?" It blew up!" I thought he meant the rocket boosters exploded before it got off the ground but that the shuttle itself was intact. Then I went to the campus center lounge and saw exactly what had happened on TV.

Twenty years. . . . Has it been that long?

Here's a creepy coincidence: January 28, 1986 was a Tuesday. January 28 fell on a Tuesday in 2003. Four days later, Columbia self-destructed upon re-entry. Kind of weird that both shuttles were destroyed in weeks ending February 1.

[EmoJoe]

I wasnt born yet, but RIP

[Steve M.]

It was weird. . . . Just a few nights before 1/28, Johnny Carson was making teacher jokes about Christa McAuliffe - "Will she grade her fellow astronauts?" and things like that.

[MsOrange]

I was only 1... but the first time I watched a documentary on it I cried... expecially when the families start talking

[theshark8777]

HOUSTON - Twenty years ago, millions of television viewers were horrified to witness the live broadcast of the space shuttle Challenger exploding 73 seconds into flight, ending the lives of the seven astronauts on board. And they were equally horrified to learn in the aftermath of the disaster that the faulty design had been chosen by NASA to satisfy powerful politicians who had demanded the mission be launched, even under unsafe conditions. Meanwhile, a major factor in the disaster was that NASA had been ordered to use a weaker sealant for environmental reasons. Finally, NASA consoled itself and the nation with the realization that all frontiers are dangerous and to a certain extent, such a disaster should be accepted as inevitable.

At least, that seems to be how many people remember it, in whole or in part. That’s how the story of the Challenger is often retold, in oral tradition and broadcast news, in public speeches and in private conversations and all around the Internet. But spaceflight historians believe that each element of the opening paragraph is factually untrue or at best extremely dubious. They are myths, undeserving of popular belief and unworthy of being repeated at every anniversary of the disaster.

The flight, and the lost crewmembers, deserve proper recognition and authentic commemoration. Historians, reporters, and every citizen need to take the time this week to remember what really happened, and especially to make sure their memories are as close as humanly possible to what really did happen.

If that happens, here's the way the mission may be remembered:

1. Few people actually saw the Challenger tragedy unfold live on television.
2. The shuttle did not explode in the common definition of that word.
3. The flight, and the astronauts’ lives, did not end at that point, 73 seconds after launch.
4. The design of the booster, while possessing flaws subject to improvement, was neither especially dangerous if operated properly, nor the result of political interference.
5. Replacement of the original asbestos-bearing putty in the booster seals was unrelated to the failure.
6. There were pressures on the flight schedule, but none of any recognizable political origin.
7. Claims that the disaster was the unavoidable price to be paid for pioneering a new frontier were self-serving rationalizations on the part of those responsible for incompetent engineering management — the disaster should have been avoidable.

Myth #1: A nation watched as tragedy unfolded
Few people actually saw what happened live on television. The flight occurred during the early years of cable news, and although CNN was indeed carrying the launch when the shuttle was destroyed, all major broadcast stations had cut away — only to quickly return with taped relays. With Christa McAuliffe set to be the first teacher in space, NASA had arranged a satellite broadcast of the full mission into television sets in many schools, but the general public did not have access to this unless they were one of the then-few people with satellite dishes. What most people recall as a "live broadcast" was actually the taped replay broadcast soon after the event.

Myth #2: Challenger exploded
The shuttle did not explode in the common definition of that word. There was no shock wave, no detonation, no "bang" — viewers on the ground just heard the roar of the engines stop as the shuttle’s fuel tank tore apart, spilling liquid oxygen and hydrogen which formed a huge fireball at an altitude of 46,000 ft. (Some television documentaries later added the sound of an explosion to these images.) But both solid-fuel strap-on boosters climbed up out of the cloud, still firing and unharmed by any explosion. Challenger itself was torn apart as it was flung free of the other rocket components and turned broadside into the Mach 2 airstream. Individual propellant tanks were seen exploding — but by then, the spacecraft was already in pieces.

Myth #3: The crew died instantly
The flight, and the astronauts’ lives, did not end at that point, 73 seconds after launch. After Challenger was torn apart, the pieces continued upward from their own momentum, reaching a peak altitude of 65,000 ft before arching back down into the water. The cabin hit the surface 2 minutes and 45 seconds after breakup, and all investigations indicate the crew was still alive until then.

What's less clear is whether they were conscious. If the cabin depressurized (as seems likely), the crew would have had difficulty breathing. In the words of the final report by fellow astronauts, the crew “possibly but not certainly lost consciousness”, even though a few of the emergency air bottles (designed for escape from a smoking vehicle on the ground) had been activated.

The cabin hit the water at a speed greater than 200 mph, resulting in a force of about 200 G’s — crushing the structure and destroying everything inside. If the crew did lose consciousness (and the cabin may have been sufficiently intact to hold enough air long enough to prevent this), it’s unknown if they would have regained it as the air thickened during the last seconds of the fall. Official NASA commemorations of “Challenger’s 73-second flight” subtly deflect attention from what was happened in the almost three minutes of flight (and life) remaining AFTER the breakup.

Myth #4: Dangerous booster flaws result of meddling
The side-mounted booster rockets, which help propel the shuttle at launch then drop off during ascent, did possess flaws subject to improvement. But these flaws were neither especially dangerous if operated properly, nor the result of political interference.

Each of the pair of solid-fuel boosters was made from four separate segments that bolted end-to-end-to-end together, and flame escaping from one of the interfaces was what destroyed the shuttle. Although the obvious solution of making the boosters of one long segment (instead of four short ones) was later suggested, long solid fuel boosters have problems with safe propellant loading, with transport, and with stacking for launch — and multi-segment solids had had a good track record with the Titan-3 military satellite program. The winning contractor was located in Utah, the home state of a powerful Republican senator, but the company also had the strengths the NASA selection board was looking for. The segment interface was tricky and engineers kept tweaking the design to respond to flight anomalies, but when operated within tested environmental conditions, the equipment had been performing adequately.

Myth #5: Environmental ban led to weaker sealant
A favorite of the Internet, this myth states that a major factor in the disaster was that NASA had been ordered by regulatory agencies to abandon a working pressure sealant because it contained too much asbestos, and use a weaker replacement. But the replacement of the seal was unrelated to the disaster — and occurred prior to any environmental ban.

Even the original putty had persistent sealing problems, and after it was replaced by another putty that also contained asbestos, the higher level of breaches was connected not to the putty itself, but to a new test procedure being used. “We discovered that it was this leak check which was a likely cause of the dangerous bubbles in the putty that I had heard about," wrote physicist Richard Feynman, a member of the Challenger investigation board.

And the bubble effect was unconnected with the actual seal violation that would ultimately doom Challenger and its crew. The cause was an inadequate low-temperature performance of the O-ring seal itself, which had not been replaced.

Myth #6: Political pressure forced the launch
There were pressures on the flight schedule, but none of any recognizable political origin. Launch officials clearly felt pressure to get the mission off after repeated delays, and they were embarrassed by repeated mockery on the television news of previous scrubs, but the driving factor in their minds seems to have been two shuttle-launched planetary probes. The first ever probes of this kind, they had an unmovable launch window just four months in the future. The persistent rumor that the White House had ordered the flight to proceed in order to spice up President Reagan’s scheduled State of the Union address seems based on political motivations, not any direct testimony or other first-hand evidence. Feynman personally checked out the rumor and never found any substantiation. If Challenger's flight had gone according to plan, the crew would have been asleep at the time of Reagan's speech, and no communications links had been set up.

Myth #7: An unavoidable price for progress
Claims that the disaster was the unavoidable price to be paid for pioneering a new frontier were self-serving rationalizations on the part of those responsible for incompetent engineering management — the disaster should have been avoidable. NASA managers made a bad call for the launch decision, and engineers who had qualms about the O-rings were bullied or bamboozled into acquiescence. The skeptics’ argument that launching with record cold temperatures is valid, but it probably was not argued as persuasively as it might have been, in hindsight. If launched on a warmer day, with gentler high-altitude winds, there’s every reason to suppose the flight would have been successful and the troublesome seal design (which already had the attention of designers) would have been modified at a pace that turned out to have been far too leisurely. The disaster need never have happened if managers and workers had clung to known principles of safely operating on the edge of extreme hazards — nothing was learned by the disaster that hadn’t already been learned, and then forgotten.

[James]

I remember where I was when I learned of the tragedy. I was in sixth period art class (eighth grade). A classmate told me the Challenger exploded, but I didn't believe him. A few minutes later an announcement of the space shuttle's ill fate came over the loudspeaker.

[Dean Winchester]

it's odd but I was six at the time and didn't remember hearing about it until later on.

I do remember later on when a documentary about it was on, my mom mentioned that my older brother, who I hate and think is one of the most evil people alive, made a "so it exploded, big deal" type of comment when it happened (she wasn't exactly the president of my brothers fan club herself), which IMO, proves just the type of malicious, vicious ******* he is.

[PZelda]

If anybody wants to watch the broadcast tonight, it airs twice tonight and twice tomorrow at 8pm and again at 11pm, both Eastern time.

http://www.cnn.com/CNN/Programs/presents/

Apparently this is a rerun and it aired for the first time this past Sunday.

[TJL]

Wow. Hard to beleive it's been 20 years. I remember that day.

[rusyd]

I remember that day bc I was babysiting my niece and I saw it on TV and remember thinking -What the hell just happened?? Very sad day.