US-SPACE-SHUTTLE-ENDEAVOUR

Workers install the final payload, a configuration similar to the STS-118 mission, consisting of a flown SPACEHAB, into the Space Shuttle Endeavour which is on display at the California Science Center in Los Angeles on October 9, 2014. This is the first time the payload bay doors of an operational space shuttle orbiter have been opened anywhere except at the Kennedy Space Center or the Palmdale assembly facility. The doors are made of very lightweight composite material and were not designed to be operated on Earth under its gravitational influence. AFP PHOTO/Mark RALSTON (Photo credit should read MARK RALSTON/AFP via Getty Images)