Kenny R. White, Marine veteran, native of San Diego, Calif., listens as Mathieu Brundige, tank crewman, 1st Tank Battalion, explains the functionalities of the M1A1 Abrams on the units tank ramp, Dec. 22, 2014. White served as a tank crewman for 17 years as a reservist in 4th Tank Battalion. (Official Marine Corps photo by Lance Cpl. Medina Ayala-Lo/Released) - Kenny R. White, Marine veteran, native of San Diego, Calif., listens as Mathieu Brundige, tank crewman, 1st Tank Battalion, explains the functionalities of the M1A1 Abrams on the units tank ramp, Dec. 22, 2014. White served as a tank crewman for 17 years as a reservist in 4th Tank Battalion. (Official Marine Corps photo by Lance Cpl. Medina Ayala-Lo/Released)