Former intelligence official David Grusch testified under oath to Congress that the US government possesses non-human craft and biologics in a secret retrieval program.
Multiple United Airlines employees watched a metallic disc hover over O'Hare Airport before it shot upward through the cloud layer, leaving a visible hole.
A former police officer photographed a small entity on Ilkley Moor before witnessing a craft depart; he later recalled an abduction under hypnosis.
A disc-shaped craft landed briefly on a French farm, leaving physical traces that were scientifically analyzed by the French government's official UFO research unit.
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.
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.