How NASA Uses the Ocean to Train Astronauts for its Most Dangerous Missions

The astronauts are wearing white suits with American flags and mission patches on them. They're aware but unworried about the hostile environment inches away from their noses. They'd be dead in seconds if it were not for their air supply. As they bound nimbly along in a state of near-weightlessness, all each… » 7/19/12 11:00am 7/19/12 11:00am