Douglas C-54A-5-DO Skymaster 42-107451 (displayed as 42-72252) (MSN 7470) was VC-54C "Sacred Cow"; and was used by Presidents Roosevelt and Truman. The aircraft was manufactured by Douglas using a C-54A fuselage and C-54B wings. One special feature is an elevator behind the passenger cabin to lift President Roosevelt in his wheelchair in and out of the plane -- an otherwise difficult procedure. The passenger compartment includes a conference room with a large desk and a bulletproof picture window. By 6/44: TOS USAAF, assigned to the 503rd Army Air Force Base Unit at Bolling Field, DC. 7/1/44: Flew its first mission, with Secretary of War Henry L. Stimson, to Naples, Italy via Casablanca.

Return trip was first non-stop UK to Washington, DC flight, made in 17 hours 50 min. 8/44: Flew to Rio de Janeiro to pick up Madame Chiang Kai-Shek. Flying back 5300 miles with only two stops, it was the first time an airplane flew more than 5000 miles in a day. She was brought to the USA for medical treatment. Before taking FDR to Yalta, it was painted as 42-72252 which was lost in the Pacific, probably for security reasons.

1/21/45: Departed Washington, DC for its participation in movement of personnel for the Yalta Conference. After first flying to Naples, the aircraft then made a dry run into the Russian airfield Saki, about 60 miles from Yalta. Feb 3, 1945 : Picked up President Roosevelt at Malta (where he had arrived by ship) and flew him to Saki.