Expedition 31/32 Soyuz Commander Gennady Padalka are greeted by Russian officials upon their arrival in Baikonur Kazakhstan May 2, 2012.

Expedition 31/32 Soyuz Commander Gennady Padalka (center) and his crewmates are greeted by Russian space officials upon their arrival in Baikonur, Kazakhstan May 2, 2012 after flying from their training base in Star City, Russia for final preparations for their launch May 15, Baikonur time, to the International Space Station on their Soyuz TMA-04M spacecraft. Joining Padalka are NASA Flight Engineer Joe Acaba (left) and Flight Engineer Sergei Revin.

NASA/Victor Zelentsov