Expedition 31 Flight Engineer Joe Acaba performs the tradition of signing one of the doors at the Cosmonaut Hotel on Tuesday, May 15, 2012 in Baikonur, Kazakhstan. The Soyuz spacecraft with Acaba, Expedition 31 Soyuz Commander Gennady Padalka, and Flight Engineer Sergei Revin of Russia aboard launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit (NASA/Bill Ingalls)