This is the 2nd volume in Richard Dolan's series, "UFOs and the National Security State," which covers all aspects of the UFO phenomenon from the 1940s to the present day. Volume 2, "The Cover-Up Exposed, 1973-1991," analyzes the UFO sightings, politics, and research that occurred during the last two decades of the cold war. Working from archival sources, professional journals, and his own investigations, Dolan describes UFO encounters worldwide, demonstrating that the phenomenon is global, and the result of advanced technology. Many cases involved sensitive military airspace. These include intrusions over American and Canadian air bases; attempts to intercept a UFO over Tehran; the landing of an unknown object near two airbases in Britain; large boomerang-shaped craft near New York City; unexplained triangular craft seen throughout the U.