Don Pettit, NASA's oldest active astronaut at 70, arrives in Houston after 7-month space mission (photo)

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NASA's oldest active astronaut, the 70-year-old Don Pettit, has returned home to Houston after a seven-month stint aboard the International Space Station.

Don Pettit, NASA's oldest active astronaut at 70, arrives in Houston after 7-month space mission (photo) : Read more