Christina M. Hammock, one of the eight-member 2013 class of NASA astronaut candidates, speaks to a special media-day crowd at the Johnson Space Center's Space Vehicle Mock-up Facility on Aug. 20.
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Taken in
Johnson Space Center
Author
NASA
Description
Christina M. Hammock, one of the eight-member 2013 class of NASA astronaut candidates, speaks to a special media-day crowd at the Johnson Space Center's Space Vehicle Mock-up Facility on Aug. 20.