Expedition 24 crew members take a break at NASA's Johnson Space Center to pose for a crew portrait.

Expedition 24 crew members take a break from training at NASA's Johnson Space Center to pose for a crew portrait. Pictured clockwise are Russian cosmonaut Alexander Skvortsov (bottom), commander; NASA astronauts Tracy Caldwell Dyson and Doug Wheelock; Russian cosmonauts Mikhail Kornienko and Fyodor Yurchikhin; along with NASA astronaut Shannon Walker, all flight engineers.