International Space Station Expedition 39
Expedition 39, ISS039-S-002, crew members take a break from training to pose for a crew portrait at NASA's Johnson Space Center, Houston, Texas, July 12, 2013. Pictured on the front row is Japan Aerospace Exploration Agency astronaut Koichi Wakata (right), commander, and NASA astronaut Steve Swanson, flight engineer. Pictured from the left (back row) are Russian cosmonauts and flight engineers Oleg Artemyev, Alexander Skvortsov, Mikhail Tyurin and NASA astronaut Rick Mastracchio. (NASA-JSC photo/ Bill Stafford)