Officially, the U.S. government ended its study of UFOs in 1969 because -- it assured the public -- there is no proof the phenomena represents a threat to national security. <br /> <br />But what if these unknown aircraft showed an interest in our nuclear weapons? <br /> <br />By George Knapp, Matt Adams <br />www.lasvegasnow.com <br />7-6-16 <br /> <br />A group of more than 150 military veterans, missile officers, and security personnel, including many who worked at the Nevada Test Site, say they've seen mystery intruders over nuclear facilities. <br /> <br />In the darkest days of the Cold War, atomic weapons were routinely exploded above ground at the Nevada Test Site, the most nuked placed on earth. <br /> <br />In 1955, 14 A-bombs were detonated as part of Operation Teapot, witnessed by thousands of military personnel in trenches, and by thousands of test site employees. But there were other observers as well. <br /> <br />"It was what we called flying saucers. They were pretty prevalent at the test site back then," said a former test site photographer. <br /> <br />At least a dozen former test site employees have told similar stories about unknown aircraft showing up hours or days after an atomic blast. ... http://www.lasvegasnow.com/news/i-team-new-film-claims-ufos-monitored-nuclear-weapons