NASA STS-129 mission pilot Barry Wilmore, second from left, demonstrates weightlessness in space with Trent Petersen, a student at Stuart-Hobson Middle School, left, as crew members Mike Foreman, Leland Melvin and Randy Bresnick, right, look on during a presentation about their recent mission, Thursday, Jan. 14, 2010, at the Smithsonian National Air and Space Museum in Washington. Photo Credit: (NASA/Paul E. Alers)