The space shuttle Atlantis, with the Earth behind it, still is docked to the International Space Station early on Tuesday, July 18, 2011, in this image made from NASA TV. (AP Photo/NASA)
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The space shuttle Atlantis, with the Earth behind it, still is docked to the International Space Station early on Tuesday, July 18, 2011, in this image made from NASA TV. (AP Photo/NASA)
