Shuttle's final salute caps off 30 years of Discovery (51 images)

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 photo taken by an Astronaut onboard the Space Shuttle Discover shows the International Space Station as the space shuttle separates, March 25, 2009. Earlier the STS-119 and Expedition 18 crews concluded 9 days, 20 hours and 10 minutes of cooperative work onboard the shuttle and station to install a solar array trust onto the station. (UPI Photo/NASA)
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