Expedition 31 crew members pose for an in-flight crew photo in the Zvezda Service Module of the International Space Station.

Expedition 31 crew members pose for an in-flight crew photo in the Zvezda Service Module of the International Space Station. Pictured on the front row are Russian cosmonaut Oleg Kononenko (center), commander; along with NASA astronaut Don Pettit (left) and European Space Agency astronaut Andre Kuipers, both flight engineers. Pictured from the left (back row) are NASA astronaut Joe Acaba; along with Russian cosmonauts Gennady Padalka and Sergei Revin, all flight engineers.