Dunning has reported that the observed object was identified by the FAA as an advertising blimp operated by the American Blimp Company. 2004–2006 Tinley Park Lights Three red lights hovered in a triangular formation were seen by multiple witnesses in Tinley Park and Oak Forest, Illinois, on August 21, 2004, two months later on October 31, 2004, again on October 1, 2005, and once again on October 31, 2006. The lights were photographed and captured on video by some witnesses. According to some ufologists, the video evidence suggests that the lights kept the geometrical shape and moved as if they were attached to each other through a dark object. The incident was examined in a Dateline NBC episode on May 18, 2008, and in the episode "Invasion Illinois" of the television series UFO Hunters premiered on The History Channel on October 29, 2008. Military aircraft Classified military aircraft may be responsible for a number of black triangle UFO reports. Several such sightings have been reported over Antelope Valley, an area of desert in southern California. This stretch of desert draws people interested in potential "black project" aircraft, because it is close to several known military research and testing areas, such as Edwards Air Force Base in California, and United States Air Force Plant 42. A geographic analysis by the now-inactive National Institute for Discovery Science suggested that black triangles might be U.S. Air Force craft. At least some of the proposed military types may be fictitious. The Northrop TR-3A Black Manta is a speculative surveillance aircraft purported to belong to the United States Air Force and to have been developed under a black project. It was said to be a subsonic stealth spy plane with a flying wing design. It was alleged to have been used in the Gulf War to provide laser designation for Lockheed F-117 Nighthawk bombers, for targeting to use with laser-guided bombs. There is little evidence to support the TR-3's existence; however it is possible that black triangle UFO reports associated with Black Manta could be a technology demonstrator for a potential new-generation tactical reconnaissance aircraft, and/or that TR-3 refers to a Technical Refresh of an existing programme. Geoscientist Ben McGee has identified border patrol drones with infrared anti-collision or identification lights as an explanation of some black triangles. References Further reading "TR-3A Evolved From Classified Prototypes, Based on Tactical Penetrator Concept" Aviation Week & Space