Final flyover for space shuttle Discovery

The space shuttle Discovery, carried on the back of a jumbo jet, flies over Washington on Tuesday en route to the Smithsonian National Air and Space Museum.

Tom Couch, left, of Chantilly, Va., and Carlos Rodriguez of Dumfries, Va., wait outside the Smithsonian Air and Space Museum Udvar-Hazy Center on Tuesday, April 17, 2012 to see the space shuttle Discovery fly by on its way to Washington Dulles International Airport. "I'm just sad that it's ending," said Rodriguez of the shuttle program. "This is kind of a bucket list thing. Maybe my kids or grandkids will see another one, but I won't." (Barbara L. Salisbury/The Washington Times)

Tom Couch, left, of Chantilly, Va., and Carlos Rodriguez of Dumfries, Va., wait outside the Smithsonian Air and Space Museum Udvar-Hazy Center on Tuesday, April 17, 2012 to see the space shuttle Discovery fly by on its way to Washington Dulles International Airport. "I'm just sad that it's ending," said Rodriguez of the shuttle program. "This is kind of a bucket list thing. Maybe my kids or grandkids will see another one, but I won't." (Barbara L. Salisbury/The Washington Times)

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