General Dynamics F-111A (S/N 63-9768, third pre-production aircraft) with unswept/swept wings at the aircraft rollout on Oct. 15, 1964. (Photo: U.S. Air Force 1, 2, animgif: me)

General Dynamics F-111A (S/N 63-9768, third pre-production aircraft) with unswept/swept wings at the aircraft rollout on Oct. 15, 1964. (Photo: U.S. Air Force 1, 2, animgif: me)