there were visual confirmations that matched the radar, as well as recorded IR Video. You can listen to the pilot’s commentary during the video.
“there were visual confirmations that matched the radar”
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Because they were talking about what was on their screens. No one ever saw anything with their bare eyeballs.
Until the military can figure out how to mount cameras (maybe an oldtimer knows how they used to do it) on their aircraft things such as this will remain a mystery - though it’s most likely an electronic hiccup. No little green people with antenna-heads needed to explain this one.