ISS015-E-34421 (12 Oct. 2007) --- Astronaut Peggy Whitson, Expedition 16 commander, and cosmonaut Yuri Malenchenko, flight engineer representing Russia's Federal Space Agency, are pictured during their first hours aboard the International Space Station talking with Russia's Federal Space Agency cosmonaut Fyodor Yurchikhin (partially visible at right), Expedition 15 commander. Whitson served a six-month tour of duty on the space station as flight engineer several years ago, and Malenchenko served a similar tour as commander of an earlier expedition