August 14, 2012
NASA astronaut Rex Walheim, STS-135 mission specialist, participates in 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
Topics:
Technology Internet, Rex J. Walheim, Space exploration, NASA, Space Center Houston, Gregory J. Harbaugh, Lyndon B. Johnson Space Center, United States, National Aeronautics and Space Administration
