Space shuttle Discovery atop a 747 carrier jet departs the Kennedy Space Center, Tuesday, April 17, 2012, in Cape Canaveral, Fla. Discovery is being transported to the Smithsonian National Air and ... more 
Space shuttle Discovery atop a 747 carrier jet departs the Kennedy Space Center, Tuesday, April 17, 2012, in Cape Canaveral, Fla. Discovery is being transported to the Smithsonian National Air and Space Museum in Washington. (AP Photo/John Raoux) less 
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Associated Press | Photo By John Raoux
Tue, Apr 17, 2012 8:05 AM EDT