Expedition 23 crew members take a break at NASA's Johnson Space Center to pose for a crew portrait.

Expedition 23 crew members take a break from training at NASA's Johnson Space Center to pose for a crew portrait. From the left are Russian cosmonaut Mikhail Kornienko, NASA astronaut Tracy Caldwell Dyson, Russian cosmonaut Alexander Skvortsov, all flight engineers; Russian cosmonaut Oleg Kotov, commander; NASA astronaut T.J. Creamer and Japan Aerospace Exploration Agency (JAXA) astronaut Soichi Noguchi, both flight engineers.