Space shuttle Discovery flies atop jet

Space shuttle Discovery waits at the Mate-Demate structure to be to be mounted atop a 747 carrier jet, back left, at the Kennedy Space Center, Saturday, April 14, 2012, in Cape Canaveral, Fla. High winds stopped the operation and forced NASA to postpone the hoisting operation until 5 a.m. Sunday. Discovery will be transported to the Smithsonian National Air and Space Museum in Washington on Tuesday, April 17.  <span class=meta>((AP Photo/John Raoux))</span>
April 17, 2012 8:26:34 AM PDT