Space shuttle program comes full stop

The landing of Atlantis marks the end of NASA's 30-year space shuttle program.

Commander Chris Ferguson points to tiles under space shuttle Atlantis after landing at the Kennedy Space Center at Cape Canaveral, Fla., on Thursday, July 21, 2011. The landing of the spacecraft marks the end of NASA's 30-year shuttle program. (AP Photo/Scott Audette, Pool)

Commander Chris Ferguson points to tiles under space shuttle Atlantis after landing at the Kennedy Space Center at Cape Canaveral, Fla., on Thursday, July 21, 2011. The landing of the spacecraft marks the end of NASA's 30-year shuttle program. (AP Photo/Scott Audette, Pool)

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