ISS031-E-081649 (17 May 2012) --- Russian cosmonauts Gennady Padalka (background) and Sergei Revin, both Expedition 31 flight engineers, are pictured in the Harmony node of the International Space Station shortly after Padalka, Revin and NASA astronaut Joe Acaba (not pictured) docked with the space station in their Soyuz TMA-04M spacecraft.