U.S. Air Force 1st Lt. Renn D. Nishimoto, a KC-135 pilot for the 203rd Air Refueling Squadron (ARS), Hawaii Air National Guard, examines his gas mask during a Chemical, Biological, Radiological, Nuclear and Explosives (CBRNE) Exercise at Joint Base Pearl Harbor Hickam, Hawaii on Nov. 7, 2014. The 203rd ARS is undergoing mission readiness evaluation under the Commander's Inspection Program (CCIP). (U.S. Air National Guard photo by Airman 1st Class Robert Cabuco)