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Associated Press
FILE - In this March 7, 2011 image provided by NASA the space shuttle Discovery is seen from the International Space Station as the two orbital spacecraft accomplish their relative separation after an aggregate of 12 astronauts and cosmonauts worked together for over a week.  The world’s most traveled spaceship took its last flight on Tuesday, April 17, 2012. Riding on the back of a 747 jet, Discovery traveled from Cape Canaveral, Fla., to Chantilly, Va. The space shuttle will be installed this week in its new home, the Smithsonian’s National Air and Space Museum annex near Dulles in Northern Virginia.  (AP Photo/NASA)

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