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Man who warned of equipment quirk before Challenger disaster dies

Published 02/07/2012

Roger Boisjoly, who died at 73, had written an ominous memo to his supervisors at Morton Thiokol six months before the shuttle launched on Jan. 28, 1986. He told the company that cold weather could compromise the seals connecting sections of the rocket boosters they manufactured. Boisjoly and four other engineers pleaded with supervisors for a delay the night before the launch, as temperatures dipped below freezing.

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