switches in one cluster were in a different setting than the third. These were the controls to cool down the shuttle’s auxiliary power units before restarting them. “As a shuttle pilot, I knew exactly what those switches meant,” Melroy said, “and I was absolutely electrified!” The crew—“demonstrating excellent systems knowledge by taking actions not simulated in training”—had attempted to get the hydraulic systems working again after the ship lost control. Melroy said, “They were our heroes. Somehow, it made it easier to bear, knowing they were not helpless, but instead were fighting to save
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