Russian ground crews walk around the Soyuz TMA-11 spacecraft after it landed carrying Expedition 16 Commander Peggy Whitson, Flight Engineer and Soyuz Commander Yuri Malenchenko and South Korean spaceflight participant So-yeon Yi, Friday, 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/Reuters/Pool)

A Russian ground crew member examines the over turned soil near the Soyuz TMA-11 spacecraft after it landed carrying Expedition 16 Commander Peggy Whitson, Flight Engineer and Soyuz Commander Yuri Malenchenko and South Korean spaceflight participant So-yeon Yi, Friday, 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/Reuters/Pool)

Expedition 16 Flight Engineer and Soyuz Commander Yuri Malenchenko sits in a helicopter after he and fellow crew members Expedition 16 Commander Peggy Whitson and South Korean spaceflight participant So-yeon Yi landed their Soyuz TMA-11 capsule, Friday, April 19, 2008, in central Kazakhstan. Whitson and Malenchenko completed 192 days in space and Yi 11 days in orbit. Photo Credit: (NASA/Reuters/Pool)

A Russian search and rescue helicopter flies over the burning Kazakh steppe after Expedition 16 Commander Peggy Whitson, Flight Engineer and Soyuz Commander Yuri Malenchenko and South Korean spaceflight participant So-yeon Yi landed their Soyuz TMA-11 spacecraft, Friday, 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/Reuters/Pool)

The Soyuz TMA-11 capsule lays on its side on the Kazakh steppe, Friday, April 19, 2008. Expedition 16 Commander Peggy Whitson, Flight Engineer and Soyuz Commander Yuri Malenchenko and South Korean spaceflight participant So-yeon Yi landed their Soyuz TMA-11 spacecraft in central Kazakhstan to complete 192 days in space for Whitson and Malenchenko and 11 days in orbit for Yi. Photo Credit: (NASA/Reuters/Pool)

Russian Sokol flight suits of Expedition 16 Commander Peggy Whitson, Flight Engineer and Soyuz Commander Yuri Malenchenko and South Korean spaceflight participant So-yeon Yi are seen laying on the ground shortly after their Soyuz TMA-11 spacecraft landed in central Kazakhstan, Friday, April 19, 2008, to complete 192 days in space for Whitson and Malenchenko and 11 days in orbit for Yi. Photo Credit: (NASA/Reuters/Pool)

Expedition 16 Commander Peggy Whitson is helped out of a helicopter after landing in northern Kazakhstan, Friday, April 19, 2008. Whitson, Flight Engineer and Soyuz Commander Yuri Malenchenko and South Korean spaceflight participant So-yeon Yi landed their Soyuz TMA-11 spacecraft in central Kazakhstan to complete 192 days in space for Whitson and Malenchenko and 11 days in orbit for Yi. Photo Credit: (NASA/Reuters/Pool)

South Korean spaceflight participant So-Yeon YI jokes with Russian doctors in a helicopter after she and fellow crew members Expedition 16 Commander Peggy Whitson and Flight Engineer and Soyuz Commander Yuri Malenchenko landed their Soyuz TMA-11 capsule, Friday, April 19, 2008, in central Kazakhstan. Whitson and Malenchenko completed 192 days in space and Yi 11 days in orbit. Photo Credit: (NASA/Reuters/Pool)

Expedition 16 Commander Peggy Whitson is helped out of a helicopter after landing in northern Kazakhstan, Friday, April 19, 2008. Whitson, Flight Engineer and Soyuz Commander Yuri Malenchenko and South Korean spaceflight participant So-yeon Yi landed their Soyuz TMA-11 spacecraft in central Kazakhstan to complete 192 days in space for Whitson and Malenchenko and 11 days in orbit for Yi. Photo Credit: (NASA/Reuters/Pool)

Rescue helicopters fly Expedition 16 Commander Peggy Whitson, Flight Engineer and Soyuz Commander Yuri Malenchenko and South Korean spaceflight participant So-yeon Yi to Kustanay, Kazakhstan shortly after their Soyuz TMA-11 spacecraft landed in central Kazakhstan, Friday, April 19, 2008. Whitson and Malenchenko completed 192 days in space and Yi spent 11 days in orbit. Photo Credit: (NASA/Reuters/Pool)