Throughout history, unexplained aerial phenomena (UAPs) have shocked, frightened and fascinated sky watchers. And in the last century, more than a few have been reported in military contexts. In late World War II, U.S. airmen called them “foo fighters”: strange orange flying lights by the French-German border. During the Korean War, some soldiers claimed a blue-green light emitting “pulsing rays” made their whole battalion sick with what, to some, resembled radiation poisoning.