Trinidad Colorado USAF Training Encounter 1956

On November 14, 1956, a USAF B-47 Stratojet crew conducting a nuclear delivery training mission from Peterson AFB encountered a formation of disc-shaped objects at 35,000 feet over southern Colorado near Trinidad. The B-47 crew was on a classified training mission that simulated nuclear strike profiles — the specific mission type that would have generated highest alert if observed by Soviet intelligence. Pueblo ATC radar confirmed the contacts. The discs performed a high-speed pass of the B-47 before entering a formation that paced the aircraft for several minutes. The crew filed a JANAP-146 report under the special nuclear delivery mission classification that meant it was routed outside the normal Blue Book processing chain. The incident was one of several documented cases of unidentified craft appearing to observe USAF nuclear delivery training missions — a pattern that paralleled the nuclear storage facility intrusions and suggested purposeful monitoring of American nuclear operations.