This photo provided by SpaceX shows the Dragon spacecraft on a boat in the Pacific Ocean on Thursday, May 31, 2012. Triumphant from start to finish, the Dragon parachuted into the Pacific on Thursday to conclude the first private delivery to the International Space Station and inaugurate NASA's new approach to exploration. (AP Photo/SpaceX)
This photo provided by SpaceX shows the Dragon spacecraft on a boat in the Pacific Ocean on Thursday, May 31, 2012. Triumphant from start to finish, the Dragon parachuted into the Pacific on Thursday to conclude the first private delivery to the International Space Station and inaugurate NASA's new approach to exploration. (AP Photo/SpaceX)
The SpaceX Dragon supply ship returned to Earth on May 31, ending its revolutionary nine-day voyage to the International Space Station with an old-fashioned splashdown in the Pacific.