A contractor with the Infantry Immersion Trainer explains to members of the Office of Naval Research how the IIT helps Marines practice and train in real-life scenarios at Camp Lejeune, N.C., Dec. 7, 2016. The staff of the ONR took a tour of the base and various training facilities to give them a better idea of how their development, testing and evaluation translate to everyday training for the Marines. (U.S. Marine Corps photo by Lance Cpl. Miranda Faughn) - A contractor with the Infantry Immersion Trainer explains to members of the Office of Naval Research how the IIT helps Marines practice and train in real-life scenarios at Camp Lejeune, N.C., Dec. 7, 2016. The staff of the ONR took a tour of the base and various training facilities to give them a better idea of how their development, testing and evaluation translate to everyday training for the Marines. (U.S. Marine Corps photo by Lance Cpl. Miranda Faughn)