NASA

provided Disney's Imagineering team with tours, briefings and
discussions about human and robotic missions, as well as the
challenges future missions, like a trip to Mars, might present. The
attraction took five years and some 350,000 work-hours to build.
During a special ceremony, an actual Mars rover made a ceremonial pass
through wet cement. Administrator O'Keefe's quote will be affixed
near the rover's tracks in the attraction's planetary courtyard. The
latest developments and discoveries on Mars also were shared during
the event.