Expedition 20 crewmembers pose for a crew portrait. From the right (front row) are cosmonaut Gennady Padalka, Expedition 19/20 commander; and ESA astronaut Frank De Winne, Expedition 20 flight engineer and Expedition 21 commander. From the left (back row) are NASA astronaut Michael Barratt, Expedition 19/20 flight engineer; Canadian Space Agency astronaut Robert Thirsk, Expedition 20/21 flight engineer; Japan Aerospace Exploration Agency (JAXA) astronaut Koichi Wakata, 18/19/20 flight engineer; and cosmonaut Roman Romanenko, Expedition 20/21 flight engineer.