6. RB-47 UFO Encounter • 1957
The RB-47 UFO sighting was reported by U.S. Air Force officers in the southern United States, so it was taken very seriously at the time. Equipment in Duncanville, Texas detected and tracked the UFO until it disappeared.

7. The Falcon Lake Incident • 1967
In Canada, Stephen Michalak had a close encounter with a UFO that left him with burns across his chest and ongoing health problems. The burn marks seen by doctors just hours after his reported encounter matched his description of the underside of the UFO.