The Unknowns: Mystifying UFO Cases 2017 Synopsis - In this video I delve into the expansive and complicated history of American UFO research. More precisely, the government sanctioned undertaking known as Project Blue Book. Many hundreds of cases were left unresolved upon the project's conclusion in 1969. These were dubbed the unknowns. As someone who is largely unfamiliar with UFO history, I explore a select few of these unknowns in order to understand what makes them so mystifying.