Uncovering the details and history behind decades of US government investigations into UFOs known as Project Blue Book. For decades, the U.S. government has investigated reports of unidentified flying objects, compiling case files and interviewing witnesses. In the 1950s, they launched an initiative that began as an effort to explain countless mysterious lights and UFO sightings that quickly sparked rumors of cover-ups and conspiracies. Today, we explore the origin and investigations of Project Blue Book.