UFO ‘invasion’ of NATO war games revealed in ‘Project Blue Book’ season finale | Space
When a massive international war-games exercise known as Operation Mainbrace convened in the North Sea in 1952, it brought together 80,000 military personnel, 1,000 planes and 200 ships from nine countries. There were also some unexpected attendees: . Multiple sightings of unidentified flying objects (UFOs) during Operation Mainbrace (also known as>>>









