The cover of Imminent, the book Luis Elizondo published in 2024 Luis Elizondo/HarperCollins/United States Department of Defense, Public domain, via Wikimedia Commons
Luis Elizondo, who says he led the Pentagon's AATIP effort, published Imminent: Inside the Pentagon's Hunt for UFOs, arguing that UFOs are a serious national security issue the Defense Department withholds. The Pentagon said in 2019 he had no responsibilities for AATIP.