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