Plot: Studies some of the most disturbing UFO sightings, including: a 4-day extravaganza in 1952, when UFOs cruised the skies over the White House; sightings in 1967 near a secret US/Canadian submarine detection base; controversial events at the UK/US air base at Bentwaters, England; and the military's Test Area 51 in Nevada. Recounts the recorded UFO encounters that have taken place near test ranges, air bases and nuclear power plants