Hammergren, weather conditions on the day of the sighting were right for a "hole-punch cloud", an unusual weather phenomenon. UFO investigators have argued that the FAA's refusal to look into the incident contradicts the agency's mandate to investigate possible security breaches at American airports such as in this case; an object witnessed by numerous airport employees and officially reported by at least one of them, hovering in plain sight, over one of the busiest airports in the world. Some witnesses interviewed by the Chicago Tribune were apparently "upset" that federal officials declined to further investigate the matter. NARCAP report The National Aviation Reporting Center on Anomalous Phenomena (NARCAP) published a 155-page report on the sighting and has called for a government inquiry and improved energy-sensing technologies: "Anytime an airborne object can hover for several minutes over a busy airport but not be registered on radar or seen visually from the control tower, constitutes a potential threat to flight safety." Media coverage The Chicago O'Hare airport UFO story was picked up by various major mainstream media groups such as CNN, CBS, MSNBC, Fox News, Chicago Tribune, and NPR. On February 11, 2009, The History Channel aired an episode of the television show UFO Hunters with the title "Aliens at the Airport" in which they reviewed the incident. The incident is also featured in the television series Hangar 1: The UFO Files episode "Unfriendly Skies". In popular culture The film UFO refers to this incident, as does an episode of Boston Legal''. See also List of UFO sightings References External links National Aviation Reporting Center – 155 page report – July 2007 UFO sightings in the United States Government responses to UFOs O'Hare International Airport O'Hare International Airport UFO sighting O'Hare International Airport UFO sighting O'Hare International Airport UFO sighting