Retired Col. Steven Lindsey, a NASA astronaut, occupies the commander's station during a simulation in the motion-base shuttle mission simulator at the Johnson Space Center in Houston Jan. 25, 2010. Colonel Lindsey, a 1982 graduate of the Air Force Academy, is the commander for the Space Shuttle Discovery's STS-133 mission, scheduled to lift off Feb. 24, 2011. (NASA photo/James Blair)