Incidentally, Col. Conrad and others were rightly nervous about UFO interest in nuclear weapons, their ability to come and go over secret facilities at all, and even "interfere" with them in some way.
It has happened many times over the decades, more than most people realize.
What if these peculiar aliens feel like setting off a nuclear bomb? They certainly could if they wanted to. Some people think that these incursions are not just for purposes of observation but a warning about what they could do if they felt like it. You see what I mean?
Wasn't there reports of a UFO disabling ICBM's at Malmstrom AFB in 1967 and even reports later that the Soviets had the same ordeal at one of their bases?