The family of Expedition 31 Flight Engineer Joe Acaba sings happy birthday to him from the Russian Mission Control Center in Korolev, Russia, Thursday, May 17, 2012. Acaba, Expedition 31 Soyuz Commander Gennady Padalka, and Flight Engineer Sergei Revin, docked their Soyuz TMA-04M spacecraft to the space station at 8:36 a.m. Moscow time, two days after they launched from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Bill Ingalls)