In November 1953, Felix Moncla was a United States Air Force pilot on assignment in Michigan at Kinross Airforce Base. One day, he was sent to check on an unidentified aircraft flying over Soo Locks in Lake Superior, which is restricted airspace. When he flew out there to check things out, the radar showed Moncla and the unidentified aircraft overlapping each other at one point. However, soon after, only one remained, and the UFO flew north and disappeared from the radar. No trace of Moncla or his aircraft remained and the encounter has been a mystery every since.