Today, Tamron pulls back the curtain on UFO stories that have made international headlines and will hear first-person encounters with the unknown that made it all the way to Congress. Joining the conversation, journalist and host of "The Proof is Out There" TONY HARRIS, on how the series takes an in-depth look at unexplained and mysterious events. Then, former F-18 fighter pilot RYAN GRAVES on his own experiences during his career. Plus, Texas businessman STEVE ALLEN relives the night that changed his life in the Netflix docu-series "Encounters."