As the military prepares to release what it knows about unidentified aerial phenomena -- or UAPs, but better known as UFOs -- former service members and Pentagon officials are becoming increasingly vocal about what they've seen in the skies that can't be explained.

In a blockbuster report Sunday on "60 Minutes," multiple military officials told reporter Bill Whitaker that the U.S. military has repeatedly observed aircraft that it can't identify. The aircraft have displayed extraordinary capabilities that have been both observed by aviators and captured on radar, video and other data.

Whether their origins are extraterrestrial, or come from an adversary's advanced research laboratories, the officials say these aircraft far surpass all limitations of known technology -- and seemingly even laws of physics.

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