As posted earlier, the laser-pointer effect. It's ever there! No, it's over there! It's defying the natural laws.....or, it's an illusion. Utilizing the oldest form of asymmetrical warfare known to man.
The closet the world ever got to nuclear annihilation was in 1983. Russian military command, specifically Stanislav Petrov tracked inbound US ballistic missiles heading for Russia. Having a cool head and notating certain anomalies, he devised that is was an incorrect reading....AFTER....the missiles were supposed to arrive. It's debatable whether he notified his superiors, but his giant mammoth balls saved the entire globe in NOT following protocol and launching their own. It was a bad computer reading. The point being in this day of tech, warfare takes the forms of ones and zero's, but the tactics haven't changed: Obfuscation, deception, and decoys still remain effective. If you can blind your enemy or make them think something is there that isn't, you have the advantage.
AND.....I hope UFO's are real.....