Marines with Combat Logistics Battalion 31, 31st Marine Expeditionary Unit (MEU), scan role-players posing as non-combatant evacuees for unauthorized items during simulated non-combatant evacuation operation at Camp Hansen, Okinawa, Japan, July 23, 2020. - Marines with Combat Logistics Battalion 31, 31st Marine Expeditionary Unit (MEU), scan role-players posing as non-combatant evacuees for unauthorized items during simulated non-combatant evacuation operation at Camp Hansen, Okinawa, Japan, July 23, 2020.