Commandant of the Marine Corps Gen. Robert B. Neller speaks to Marines at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., July 19, 2017. Neller spoke to the Marines about how they should treat each other and the importance of our culture. (U.S. Marine Corps photo by Cpl. Samantha K. Braun) - Commandant of the Marine Corps Gen. Robert B. Neller speaks to Marines at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., July 19, 2017. Neller spoke to the Marines about how they should treat each other and the importance of our culture. (U.S. Marine Corps photo by Cpl. Samantha K. Braun)