Luis “Lue” Elizondo is the former head of the Pentagon’s Advanced Aerospace Threat Identification Program (AATIP), which investigated UFOs, now referred to as Unidentified Anomalous Phenomena (UAP). A veteran of the U.S. Army, he has worked in counterintelligence and counterterrorism worldwide. His new book, “Imminent: Inside the Pentagon’s Hunt for UFOs,” is available now.