Members of the STS-119 crew pose for a group portrait in front of space shuttle Discovery on Runway 15 at NASA's Kennedy Space Center in Florida. From left are Commander Lee Archambault, Pilot Tony Antonelli and Mission Specialists Joseph Acaba, Steve Swa

Members of the STS-119 crew pose for a group portrait in front of space shuttle Discovery on Runway 15 at NASA's Kennedy Space Center in Florida, following return from their 13-day, 5.3-million mile journey on the STS-119 mission to the International Space Station. From left are Commander Lee Archambault, Pilot Tony Antonelli and Mission Specialists Joseph Acaba, Steve Swanson, Richard Arnold and John Phillips ca. 2009. (Photo by: HUM Images/Universal Images Group via Getty Images)