Science: Deke's Comeback

It was a day that Donald K. ("Deke") Slayton would never forget. On March 15, 1962, only two months before the taciturn astronaut was scheduled to become the second American to orbit the earth, NASA doctors abruptly grounded him. Reason: they had discovered an occasional irregularity in the rhythm of his heartbeat. The bitterly disappointed Slayton subsequently became chief of flight-crew operations at the Manned Spacecraft Center and played a key role in picking all future space crews, including the first men to land on the moon. But even as he sent other...

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