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What's It Really Like to Be a NASA Astronaut?

Colonel Terry Virts has one of the most demanding jobs in the world. He is an active NASA astronaut, has flown the space shuttle, conducted spacewalks, and was the commander of the International Space Station in spring 2015. VOA's Peggy Chang and Shan Xu spoke with him at the Johnson Space Center in Houston and found out what it’s really like to be an astronaut.