Science Space Shuttle Discovery mounted on 747 for ride to Smithsonian (+video)

The retired Space Shuttle Discovery is now sitting on top of NASA's modified jumbo jet, in preparation for its delivery to the Smithsonian Air and Space Museum.

Joe Skipper/Reuters

NASA mounted space shuttle Discovery on a jumbo jet Sunday (April 15), in preparation for the retired orbiter's delivery to the Smithsonian. The paired air- and spacecraft are expected to depart Florida for Washington, D.C., on Tuesday morning (April 17), weather permitting.