US astronaut Donald "Deke" Slayton on his amazing 1951 UFO encounter

On December 12, 1951, Slayton had an extraordinary aerial experience while testing out a P-51 Mustang in the skies over Minnesota. He described it in his 1995 autobiography, Deke!:

"I realized I wasn't closing on that son of a bitch. A P-51 at that time would cruise at 280 miles an hour. But this thing just kept going and climbing at the same time at about a forty-five-degree climb. I kept trying to follow it, but he just left me behind and flat disappeared. The guys on the ground tracked it with a theodolite, and they'd computed the speed at four thousand miles an hour."
(http://ufopartisan.blogspot.com)

Donald (Deke) Slayton (1924-1993).
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