UFOs allegedly shut down ten nuclear missiles in a bizarre incident at a US military base - and the global phenomena may have been triggered by the first atomic bomb tests in the 1940s, it has been claimed.

Strange objects in the sky are under intense focus as the US to release an intelligence report ordered by Congress on the issue after a flurry of leaked videos showing close encounters with warships and fighter planes.

Gary Heseltine, vice president of ICER, a new organisation set up ahead of the Pentagon report to call for full disclosure and an end to the stigma on the topic, believes the UFO story starts with man's first nuke bomb tests in 1945.

And he points to the incredible tale of Captain Robert Salas, a former US nuclear launch officer, who went public with an extraordinary claim - stating in 1967 a UFO appeared at Malmstrom Air Force Base in Montana.

Salas claims that ten of the US's nuclear Minuteman missiles that he was overseeing inexplicably moved into the "no-go" setting - meaning they could not be launched even if the order was given.

The base allegedly took a day to bring the weapons back online - and they could not find any physical damage or explanation for the sudden problem with the missiles.

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