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Serious people with serious equipment and (theoretically) the training to use it properly can also make errors.
I’m being a bit naughty and using two possible examples familiar from UFO lore:
Part of the mythos of the 1980 “Rendlesham Forest incident” at/ near RAF Bentwaters (de facto then a USAF base in England) is that deputy base commander Lt Col Charles I. Halt led a small party to investigate the area where USAF Security Police had reported seeing a UFO in the forest the previous night. Amongst other findings ... Read even more