The 51st Security Forces Squadron members at Osan Air Base, Republic of Korea, defend by praticing increased security measures during the 2011 Korea Pacific Air Forces Command Operational Readiness Inspection. An ORI is conducted to evaluate and measure the ability of units with a wartime, contingency orforce sustainment mission to perform operations plan and assigned tasks. Inspectable areas include initial response, employment, mission support and Ability-to-Survive and Operate in a chemical environment.