Lance Cpl. Alexis Vergara clears a stairway before his fire team moves to the second floor in a building in Central Training Area’s Combat Town in Okinawa, Japan, Nov. 6 2015. The Marines with Combat Logistic Battalion 31, 31st Marine Expeditionary Unit, used special effect small-arms marking system rounds and cleared buildings with opposing forces during a three day training event. Vergara, a native of Chino Hills, California, is a military policeman with Military Police Detachment, CLB 31, 31st MEU. (U.S. Marine Corps photo by Cpl. Abbey Perria/Released) - Lance Cpl. Alexis Vergara clears a stairway before his fire team moves to the second floor in a building in Central Training Area’s Combat Town in Okinawa, Japan, Nov. 6 2015. The Marines with Combat Logistic Battalion 31, 31st Marine Expeditionary Unit, used special effect small-arms marking system rounds and cleared buildings with opposing forces during a three day training event. Vergara, a native of Chino Hills, California, is a military policeman with Military Police Detachment, CLB 31, 31st MEU. (U.S. Marine Corps photo by Cpl. Abbey Perria/Released)