Boeing B-29B
Col. Irvine (center, standing) and his crew, which flew the B-29B "Pacusan Dreambat" on an unrefueled, nonstop 9,500-mile flight on Oct. 4-6, 1946. The flight went from Honolulu to Cairo, Egypt, over the Arctic regions in 39 hours, 36 minutes. The route was chosen for its hazards of winter weather and complicated navigation and communications problems. (U.S. Air Force photo)