NASA's Space Shuttle Discovery flew it's final flight on April 17, 2012, soaring over Washington, D.C. on it's way to a permanent installation at Dulles International Airport. After 30 years, NASA ended the space shuttle program last summer.
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This NASA images taken on March 7, 2011 by a crew member onboard the International Space Station shows Space Shuttle Discovery after it undocked from the International Space Station. UPI/NASA
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