JSC2011-E-021706 (25 Feb. 2011) --- NASA astronaut Chris Ferguson, STS-135 commander; and Sandy Magnus, mission specialist, use computers during a training session in a space station mock-up in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
Photographer LAUREN HARNETT
Date February 25, 2011