April 17, 2012: Space Shuttle Discovery Arrives In DC Area

April 17, 2012: The space shuttle Discovery is tethered to the back of NASA 905 Shuttle Carrier Aircraft (SCA), a modified Boeing 747 jumbo jet, as it as it does a fly over of the U.S. Capitol in Washington, DC. (Robert Markowitz/NASA/Getty Images)

April 17, 2012: The space shuttle Discovery is tethered to the back of NASA 905 Shuttle Carrier Aircraft (SCA), a modified Boeing 747 jumbo jet, as it as it does a fly over of the U.S. Capitol in Washington, DC. (Robert Markowitz/NASA/Getty Images)