The world's largest UFO organization, the Mutual UFO Network (MUFON), was originally founded in Illinois in 1969 after the Air Force abruptly ended Project Bluebook, its study of the possible existence of UFOs. Continuing where Project Bluebook left off, MUFON went about researching, investigating, and compiling reports of UFO sightings in an attempt to resolve the question of whether or not UFOs exist. In 1975, MUFON relocated to Seguin, where it resumed documenting UFO sightings, alien abductions, crop circles, and animal mutilations throughout the world by using the organization's vast network of inve stigators.

Now considered to be the preeminent UFO authority, MUFON hosts an international symposium each year, publishes its own magazine and 312-page investigator's manual, and is frequently called upon by writers from the X-Files and Unsolved Mysteries for script material. MUFON's charismatic 76-year-old founder, Walt Andrus, and the organization's vast resources--such as a museum filled with rare UFO photos, stacks of declassified government documents, and a database containing thousands of investigators' methodically researched reports--have drawn everyone from German physicists to Hollywood producers to Seguin.