Captain Robert Salas was on duty in Montana in 1967 when a UFO shut down the nuclear missiles on his base. And he's hardly the only one to make such a claim.

On Monday, six former U.S. Air Force officers and one former enlisted man will break their silence about similar events at the National Press Club, all centering around unidentified flying objects and nuclear missiles. They plan to urge the government to publicly confirm the incidents, stating that they were ordered never to discuss the events.

According to the pair, witness testimony from more than 120 former or retired military personnel points to an ongoing and alarming intervention by unidentified aerial objects at nuclear weapons sites, as recently as 2003. In some cases, several nuclear missiles simultaneously and inexplicably malfunctioned while a disc-shaped object silently hovered nearby. 

Are they evidence of unknown military action from a foreign country, or are these extraterrestrial visitors? Salas thinks the answer is clear -- and finds it curious that they're so interested in our nuclear arsenal. "There's a strong interest [in our missiles] by these objects, wherever they come from. I personally think they're not from planet Earth."

"This is only the tip of the iceberg, these stories," Salas told FoxNews.com.