The Malmstrom Nuclear Incident (1967)
On March 16, 1967, at Malmstrom Air Force Base in Montana, ten Minuteman intercontinental nuclear missiles simultaneously went into a "no-go" inoperable state as ground security reported a glowing reddish object in the sky above the launch site. Officer Robert Salas, on duty that day, would maintain for decades that the intruders seemed to understand the missile systems in intimate detail.
Witnesses
Launch officers, security
Why it endures
Ten strategic nuclear weapons neutralized at once, with a career military witness who maintained his account before the US Congress.
Official version (contested)
The military first denied any UFO connection. A 2025 Pentagon report reportedly attributed the incident to a classified electromagnetic pulse test.