Howard Hughes 800-ton, 210-foot-long flying boat with an eight story-tall tail section, nicknamed the "Spruce Goose" glides over the water in this Nov. 2, 1947 file photo in Long Beach, Calif. The aircraft which cost the government $18 million and Hughes several times that amount, flew only once at 70-feet for just about a mile. Hughes' co-pilot, David Grant, a hydraulic engineer, who did not have a pilot's license when serving as Hughes' co-pilot, died Thursday, Sept. 20, 2001. The cause of death was not reported. He was 84. (AP Photo)