Expedition 31 leaves for the International Space Station from Kazakhstan

Workers at the base of the Soyuz rocket wait for the arrival of Expedition 31 Soyuz Commander Gennady Pedalka, NASA Flight Engineer Joseph Acaba and Flight Engineer Sergei Revin at the Baikonur Cosmodrome in Kazakhstan, Tuesday, May 15, 2012. The launch of the Soyuz spacecraft with Padalka, Revin, and Acaba is scheduled for 9:01 a.m. local time on Tuesday, May 15. UPI//Bill Ingalls/NASA