Marine Corps Cpl. Giomar Medero conducts a preparatory patrol at a Special Reaction Team Special Effects Small Arms Marking System Tactics Based Training range at Combat Town, Camp Hansen, Okinawa, Japan, Nov. 22, 2017. SRT Marines act as the 911 response force across Okinawa, handling high-risk situations that military policeman may not be equipped to do. Marine Corps photo by Lance Cpl. Tayler P. Schwamb