Peggy Whitson
NASA's Peggy Whitson takes command of space station
For Whitson, 57, it was her second stint in charge of the $100 billion station, a multinational project.
Veteran NASA spacewoman gets 3 extra months in orbit
Whitson will remain on the International Space Station until September
Peggy Whitson set to break Sunita Williams' spacewalking record
Williams has made seven spacewalks totalling 50 hours and 40 minutes
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