USAF pilot George Gorman engaged in a 27-minute aerial dogfight with a maneuvering light over Fargo that outperformed his P-51 Mustang.
Two Eastern Airlines pilots observed a cigar-shaped craft with glowing windows pass their DC-3 at close range, prompting Project Sign's ET conclusion.
Captain Thomas Mantell died pursuing a large metallic UFO over Kentucky, becoming the first pilot death attributed to a UFO chase.
The US military initially announced recovery of a 'flying disc' near Roswell, NM before retracting the statement, creating the most famous UFO controversy in history.
Private pilot Kenneth Arnold's sighting of nine unusual objects near Mount Rainier launched the modern UFO era and coined the term 'flying saucers.'
Three days before the Kenneth Arnold sighting, harbor patrolman Harold Dahl reported six doughnut-shaped craft ejecting molten material near Puget Sound. Two investigating officers later died in a plane crash.