For centuries, humankind has seen objects in the sky. For every report they’ve made, those who have claimed to see unidentified flying objects have been mocked and brushed off by skeptics. But with the advent of modern technology, those sightings have now been recorded, and some have been released to the public. Were the US’s most elite pilots witness to a visitor from another planet? Or was this merely an encounter with a highly advanced Earth-based foe?