Documented sightings reported in 1975.
UFOs repeatedly hovered over nuclear missile silos at Malmstrom AFB, tracked by NORAD radar, as part of a broader wave at northern-tier military bases.
Logger Travis Walton was struck by a beam from a hovering disc and vanished for 5 days; six coworkers who witnessed the event passed polygraph tests.
Unknown craft repeatedly hovered over the nuclear weapons storage area at Loring AFB during a wave of UFO incursions at nuclear bases across the US.
South African farmer Danie van Graan observed a metallic craft with four humanoid beings at close range before being struck by a beam of light that caused permanent vision damage, with landing traces found at the site.