I also have read where a RAF Mosquito accidently shot dow a P-61 Black Widow. And in the Pacific there was an instnce where a P-61 shot down a B-29. But that was because it was damaged and the crew had bailed out while it was on auto pilot.

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For the first time I have seen "History" at close quarters,and I know that its actual process is very different from what is presented to Posterity. - WWI General Max Hoffman