Douglas World Cruisers
This photograph shows all four Douglas World Cruisers: (from left to right) Aircraft No. 1, pilot Maj. F.L. Martin and mechanic SSgt. A.L. Harvey; Aircraft No. 2, pilot 1Lt. L.H. Smith and mechanic TSgt. A.H. Turner; Aircraft No. 3, pilot 1Lt. Leigh Wade and mechanic SSgt. H.H. Ogden; Aircraft No. 4, pilot 1Lt. E.H. Nelson and 2Lt. J. Harding Jr., assistant engineering officer and mechanic. (U.S. Air Force photo)