answers: President Dwight D. Eisenhower
context: Museum of the United States Air Force at Wright-Patterson AFB, Ohio. SAM 26000 was replaced in December 1972 by another VC-137, Special Air Mission 27000, although SAM 26000 was kept as a backup until it was finally retired in 1998. Richard Nixon was the first president to use SAM 27000; the newer aircraft served every president until it was replaced by two VC-25A aircraft (SAM 28000 and 29000) in 1990. In June 1974, while President Nixon was on his way to a scheduled stop in Syria, Syrian fighter jets intercepted Air Force One to act as escorts. However, the Air </s> in 1943 for use as a presidential VIP transport, the "Guess Where II", intended to carry President Franklin D. Roosevelt on international trips. Had it been accepted, it would have been the first aircraft to be used in presidential service. However, after a review of the C-87's highly controversial safety record in service, the Secret Service flatly refused to approve the "Guess Where II" for presidential carriage. As the C-87 was a derivative of the Consolidated B-24 Liberator bomber, it presented strong offensive impressions to enemy fighter aircraft as well as foreign destinations visited, an issue not present with airplanes </s> the president. A C-87 Liberator Express was reconfigured for use as the first dedicated VIP and presidential transport aircraft and named "Guess Where II", but the Secret Service rejected it because of its safety record. A C-54 Skymaster was then converted for presidential use; this aircraft, dubbed the "Sacred Cow", carried President Franklin D. Roosevelt to the Yalta Conference in February 1945 and was subsequently used for another two years by President Harry S. Truman. The "Air Force One" call sign was created after a 1953 incident during which a Lockheed Constellation named "Columbine II", carrying President Dwight D. Eisenhower,
question: who was the first president to use air force one