In this image taken from video released by NASA, all twelve Discovery and International Space Station crew members wave during a call from President Barack Obama Thursday, March 3, 2011. From top left, Nicole Stott, Paolo Nespoli, Oleg Skripochka, Alexander Kaleri, Dmitry Kondratyev, commander Scott Kelly, Catherine Coleman, and Steve Bowen; from bottom left, Alvin Drew, pilot Eric Boe, commander Steve Lindsey, and Michael Barratt. (AP Photo/NASA)