Unidentified: Inside America’s UFO Investigation

When Lue Elizondo was part of the Pentagon’s Advanced Aerospace Threat Identification Program (AATIP) he identified five observable characteristics of UFOs, dubbed the “five observables.” But there is a so-called sixth observable Elizondo began to investigate–an invisible threat these craft may pose. On the trail of this phenomenon, he uncovers never-before-told accounts by U.S. Air Force personnel stationed at the USA’s most sensitive sites.