Airman 1st Class Karl Schwinger, 15th Aircraft Maintenance Squadron avionics mechanic (left), Staff Sgt. Jermaine Tate, 15th Aircraft Maintenance Squadron communications navigation (center) and Master Sgt. Elijah Tiqui, 154th Hawaii Air National Guard Aircraft Maintenance Squadron hydraulics (right) check their manning accountability sheets at the C-17 Aircraft Maintenance Squadron entry control point during an Operational Readiness Exercise, Joint Base Pearl Harbor-Hickam, Hawaii, March 8, 2013. OREs focus on testing the ability of Airmen to don mission-oriented protective posture, or "MOPP" gear, and survive simulated chemical attacks in an austere environment while still proceeding with the mission. (U.S. Air Force photo/Tech. Sgt. Jerome S. Tayborn)