Space shuttle Endeavour, bolted atop a modified jumbo jet, makes its departure on Sept. 19, 2012, from the Kennedy Space Center in Cape Canaveral, Fla. Endeavour will make a stop in Houston before heading to the California Science Center in Los Angeles. (Associated Press)

Photo by: John Raoux

Space shuttle Endeavour, bolted atop a modified jumbo jet, makes its departure on Sept. 19, 2012, from the Kennedy Space Center in Cape Canaveral, Fla. Endeavour will make a stop in Houston before heading to the California Science Center in Los Angeles. (Associated Press)