Dr. Cady Coleman is a NASA astronaut who has spent more than 4300 hours in space. Our senior
producer Julie Snyder asked her what it's like to sleep while orbiting the earth.
(3 minutes)
More in Space
Act One: So Over The Moon
Producer David Kestenbaum tells the story of an astronaut who returns with a very unexpected view of the great beyond.
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Nancy Updike goes to Iraq to try to figure out what it's like to be a private citizen working in the middle of a war zone.