EXACTLY !!! It WAS a secret training facility in WWII. Detailed in "A Man Called Intrepid"... if you've never read the book, I suggest you do. My old man was attached to Ground Nuclear Defense at CFB Trenton from 1960 to 1966 and he saw lots of UFO's when he worked in the cobalt fields of Ontario. One I recall him relating vividly... not a whisper, looked like a large boomerang with aircraft engines and hovered overhead before moving off at tremendous speed.