A US test missile with a dummy nuclear warhead was destroyed by an unknown flying object. A US cameraman tasked with taking videos of the missile test captured the photo sequence of the object not fired by the USA, so was it a UFO which was attempting to prevent a nuclear explosion?
There are many other reports of UFOs interfering with missile launch sites, seen flying over a base and then cutting all power to missiles even though they were individually powered. In the Soviet Union a set of missiles were switched to the last step before launch, which got the controllers panic-stricken until they managed to cut the power.