STS-133 Mission Specialists Nicole Stott and Michael Barratt participate in a crew return event.

In the Training Auditorium at NASA's Kennedy Space Center in Florida, STS-133 Mission Specialists Nicole Stott and Michael Barratt participate in a crew return event. The crew launched from Kennedy's Launch Pad 39A aboard space shuttle Discovery on its final flight on February 24, 2011 to the International Space Station. The crew delivered Robonaut 2 and the Permanent Multipurpose Module packed with supplies and critical spare parts on a 13-day mission. Discovery is being processed for retirement and will be displayed at the National Air and Space Museum's Steven F. Udvar-Hazy Center in Chantilly, Va. Photo credit: NASA/Kim Shiflett