UFO cover-up

UFO cover-up is the long-standing allegation that governments, particularly the U.S., are hiding evidence of extraterrestrial life, advanced non-human technology, or crashed craft, notably since the 1947 Roswell incident. Proponents allege a "multi-decade" effort involving misinformation, secret retrieval programs, and intimidated witnesses, aiming to manage public panic or monopolize reverse-engineered technology