It's always been mainly a cover story for experimental aircraft. That's why there are so many "UFO sightings" near the military base where they test the most ex

It's always been mainly a cover story for experimental aircraft. That's why there are so many "UFO sightings" near the military base where they test the most experimental aircraft. Obviously. In some cases it's just dirt on a lens or similar. Extremely occasionally there are aircraft they can't identify but in no cases is it ever clear that these are extraterrestrial.