FILE - In this Tuesday, Dec. 14, 2010 file picture, U.S. astronaut Catherine Coleman, left,  Russian cosmonaut Dmitry Kondratyev, center, and Italian astronaut Paolo Nespoli crew members of the mission to the International Space Station, ISS, pose through a window after a news conference at the Baikonur, Kazakhstan cosmodrome. A small piece of space junk is drifting dangerously close to the International Space Station. NASA has ordered the three station astronauts to seek shelter late Tuesday afternoon, April 5, 2011 in the Russian Soyuz capsule that is docked at the orbiting complex. A NASA spokesman says there's no time to steer the station out of harm's way. (AP Photo/Dmitry Lovetsky)

Photo by: Dmitry Lovetsky

FILE - In this Tuesday, Dec. 14, 2010 file picture, U.S. astronaut Catherine Coleman, left, Russian cosmonaut Dmitry Kondratyev, center, and Italian astronaut Paolo Nespoli crew members of the mission to the International Space Station, ISS, pose through a window after a news conference at the Baikonur, Kazakhstan cosmodrome. A small piece of space junk is drifting dangerously close to the International Space Station. NASA has ordered the three station astronauts to seek shelter late Tuesday afternoon, April 5, 2011 in the Russian Soyuz capsule that is docked at the orbiting complex. A NASA spokesman says there's no time to steer the station out of harm's way. (AP Photo/Dmitry Lovetsky)