Members of the military are set to meet at the National Press Club in Washington to talk about their UFO encounters.
The group will meet to report on the strange things they've seen and demand to know why they have been told to keep quiet.
The incidents that will be discussed will all relate to what the men say is a singular focus by UFOs on weapons storage facilities.
One of them, ICBM launch officer Captain Robert Salas, was on duty during a "missile disruption" incident at Malmstrom Air Force Base in Montana and was ordered to never discuss it.
Another participant, retired Colonel Charles Halt, observed a disc-shaped object directing beams of light into the RAF Bentwaters airbase in England and heard on the radio that they landed in the nuclear weapons storage area.
Both men claim they will provide stunning details about these events, and reveal how the US military responded.
"The US Air Force is lying about the national security implications of unidentified aerial objects at nuclear bases and we can prove it," News.com.au quoted Captain Salas as saying.
In one case, the men say several nuclear missiles malfunctioned while a disc-shaped object hovered nearby.
Attendees at the conference will be given declassified military documents that date back as far as 1948.
The group of six former US Air Force officers and one former enlisted man say they are holding the press conference because they believe it is a "public awareness issue".
Colonel Halt said he believed the security services of both the US and the UK had "attempted, both then and now, to subvert the significance of what occurred at RAF Bentwaters by the use of well-practiced methods of disinformation".
Captain Salas has previously spoken about his experience at Malmstrom Air Force base. In 2008 he recounted the story to US TV host Larry King.
"The UFO was reported by my top-side guard. A bright red oval object hovering outside the front gate," he said.
"He was very agitated, frightened, when he told me this over the phone.
"The reason I believe that what he told me is true is because they had no access to our missile system. They had no way to control it. And while this object was up there, my missiles shut down," he added.
