Even before the Apollo missions ended, rocket science had begun to lose its Olympian aura. The Challenger explosion in 1986 completed the process, making many in the U.S. aerospace industry look like reckless bumblers. But with the film "Apollo 13, "the HBO miniseries "From the Earth to the Moon," and now Gary Dorsey's Silicon Sky, the engineers behind America's successes in space are once again being cast as heroes.

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