The studio was secretly established in 1947, though the Air Force has since stressed that the facility was used solely for the Atomic Energy Commission. During this time, cameramen, who referred to themselves as “atomic” cinematographers, were hired to shoot footage of atomic bomb tests in Nevada, Utah, New Mexico and the South Pacific. While the Air Force contends that these atomic features were the only movies made, it is believed that some 19,000 “films” were produced on Lookout Mountain between 1947-1969. That’s 500 more films than Hollywood produced during the same period, and only a few dozen of them have been declassified.
Less scandalous, there is evidence that the military conducted many advanced research experiments for Hollywood studios, such as developing 3-D techniques and Vista Vision. Employees from big studios, such as Warner Brothers and MGM, were also known to frequent the lot. Additionally, Hollywood stars like Walt Disney, Marilyn Monroe, and even Ronald Reagan were given special clearance to use Lookout Mountain’s facilities, though the reason for their visits remain undisclosed.
https://www.atlasobscura.com/places/lookout-mountain-airforce-station
I've mentioned this resource several times before. Author David McGowan tells the story of an odd relationship between the occult, the hippie culture, rock music, drugs, and U.S. Military Intelligence.
Weird Scenes Inside the Canyon: Laurel Canyon, Covert Ops & the Dark Heart of the Hippie Dream
You can also find several good interviews with David McGowan on UTube. He passed away during November of 2015 at the age of 55.