" ... no obvious signs of propulsion, no wings, no control surfaces and yet still can defy the natural effects of Earth's gravity. That's precisely what we're s

" ... no obvious signs of propulsion, no wings, no control surfaces and yet still can defy the natural effects of Earth's gravity. That's precisely what we're seeing." I'd say that any 'thing' not obeying well-known Newton's laws of physics isn't a 'real' threat. (Illusions don't have to obey those laws.) What do the Navy's physicists say?