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Challenger Space Shuttle Tragedy Closeup
40 years ago, on January 28, 1986, the Challenger Space Shuttle had exploded only 72 seconds after liftoff. The cause was just a simple O-ring which was supposed to seal the rocket parts together; unfortunately, hotgases escaped through the O-ring's "airtight" seal and caused a horrific explosion. Rest in peace: • Francis R. Scobee ...
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