Aliens are living among us - Robert O. Dean

Robert O. Dean (Robert Dean) was a retired U.S. Army Command Sergeant Major who became known for his claims about extraterrestrial life and UFOs (Unidentified Flying Objects). He passed away in 2009. Dean was involved in the field of UFO research and claimed to have had experiences and encounters that led him to believe in the existence of extraterrestrial beings.

One of Dean's assertions was that extraterrestrial beings have been visiting Earth for a long time and that governments around the world have been aware of this but have kept it secret. He believed that there is a vast conspiracy to cover up the existence of aliens living among us.