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Three crew members aboard the Space Shuttle Columbia enjoy one of the lighter moments of the 11-day mission on the flight deck. Astronaut G. David Low "runs" on a treadmill device while astronauts Daniel C. Brandenstein, left, and James D. Wetherbee look on. Wetherbee's mother competed in a marathon in Houston while the crew members had their own in-space version. The treadmill served as an exerciser and also was an important element of onboard biomedical testing. This picture was used by the astronauts at their January 30, 1990 Post Flight Press Conference (PFPC) at the Johnson Space Center (JSC).