U.S. Marine Corps Lt. Col. William H. Chronister, director

U.S. Marine Corps Lt. Col. William H. Chronister, director of operations and plans, G-3/5, Marine Corps Installations West, Marine Corps Base, Camp Pendleton (MCIWEST-MCB), briefs the MCIWEST-MCB Crises Action Team during exercise Semper Durus 17 on Camp Pendleton, Calif., April 13, 2017. Semper Durus is a regional command post exercise and is comprised of a series of field training scenarios designed to improve regional command and control, enhance interagency coordination, and improve installation capabilities to respond to, and recover from, a crisis event and validate the installation mission assurance all-hazard plan. (U.S. Marine Corps photo by Cpl. Brandon Martinez)