Expedition 16 Commander Peggy Whitson, bottom, South Korean spaceflight participant So-yeon Yi and Flight Engineer and Soyuz Commander Yuri Malenchenko, top, walk down the airplane steps as they arrive at Chkalovsky Airport near Star City, Russia, Friday, April 19, 2008. Whitson, Malechenko and Yi landed their Soyuz TMA-11 spacecraft on April 19, 2008 in central Kazakhstan to complete 192 days in space for Whitson and Malenchenko and 11 days in orbit for Yi. Photo Credit: (NASA/Bill Ingalls)