In 1956, the Grumman aircraft corporation was testing its new fighter, the F-11 Tiger, off the coast of New York state. The pilot fired a long burst from its guns and moments later suffered mysterious, catastrophic damage that caved in the windshield and mortally wounded the engine. What happened? The pilot had shot himself down.
Huh? Apparently it had out-ran the shell it shot, which then hit it and shot itself down.
https://www.popularmechanics.com/mil...t-itself-down/
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