In his memoir 'Imminent: Inside the Pentagon's Hunt for UFOs', former senior defense official Luis Elizondo recounts unsettling experiences with glowing green orbs, the size of basketballs, which allegedly invaded his home over seven years. Elizondo, who led a top-secret Pentagon program investigating Unexplained Aerial Phenomena (UAPs), claims these orbs were capable of passing through walls and were witnessed by his family and neighbors. His book reveals that the Pentagon has been accumulating knowledge about UFOs since the 1940s, primarily to prevent potential threats from adversaries like the Soviet Union. Elizondo emphasizes the seriousness of the issue, stating, 'We can no longer stick our heads in the sand. We know we are not alone.' He has previously testified to Congress about the Pentagon's knowledge of UFOs and the classified nature of his work. 'Imminent' took a year to clear Department of Defense censorship before its release, highlighting the ongoing secrecy surrounding UAP investigations.