The UFO Phenomenon

abduction Adamski aerial Air Force Base aircraft airship alien alleged Allen Hynek appeared Arnold Astronomical ball lightning balloon Barney Hill began believe Bertrand Betty Andreasson Betty Hill called camera chase claimed close encounter conclusion Condon committee contactees craft creatures crew described diameter disk earth event evidence Exeter explanation extraterrestrial feet flying saucer Fortean glowing ground helicopter hoax Hopkins hovering hypnosis incident Kenneth Arnold Keyhoe Klass land later lights London look Menzel miles per hour moving Muscarello Mutual UFO Network mysterious National nearby NICAP night NUMBER OF OBJECTS officers phenomena photograph Picture Library pilot planets police Project Blue Book Project Grudge Project Sign radar radio Ruppelt Science scientific scientists seemed seen shape skeptics spacecraft spaceships Spaur stars story strange told UFO investigations UFO phenomenon UFO reports UFO research UFO sightings ufologists Unexplained unidentified flying objects University visitors Washington watched wave witnesses York