Before the jet age transformed aviation, presidential travel relied on the very best piston-powered aircraft of the time. Beginning in 1952, President Dwight D. Eisenhower flew aboard Columbine II, a VC-121A—the military variant of the Lockheed Constellation. Graceful, powerful, and ahead of its time, Columbine II was the most advanced piston-engine transport aircraft in the world when it entered presidential service.

The call sign Air Force One is so closely associated with the American presidency that it can feel like it has always been around. However, it is a relatively modern invention, born not from ceremony or symbolism, but from a moment of operational risk. Its origins trace directly to Columbine II and a flight that revealed the need for absolute clarity in presidential air travel.