Defense, intelligence communities face UFO challenges

To explore the current situation regarding possible visitation to Earth of intelligent beings from other planets and/or other dimensions, some people say we should look back to, at least, the 1940s.

According to many researchers, during the World War II era a mysterious phenomenon began to show itself – unidentified objects in the sky, sometimes near military aircraft. American air crews nicknamed the objects "foo fighters."

Also during the World War II era, there are claims that crashes of unusual craft that contained occupants may have taken place. The recovery and examination of such craft and occupants would have certainly created amazement and concerns among defense, intelligence and scientific experts and officials.

Other researchers say we should look much further back in history than World War II. They say there are indications that some kind of, or several kinds of unconventional and secretive intelligent beings have been part of Earth for centuries.