Hospital Corpsman 1st Class William Reece, assigned to Naval Mobile Construction Battalion (NMCB) 4, treats a simulated casualty during a mass casualty drill in support of Command Post Exercise (CPX) 3.

PORT HUENEME, Calif. (Feb. 01, 2017) Hospital Corpsman 1st Class William Reece, assigned to Naval Mobile Construction Battalion (NMCB) 4, treats a simulated casualty during a mass casualty drill in support of Command Post Exercise (CPX) 3. The intent of CPX-3 is to establish command, control, communication, computer and intelligence infrastructure to prepare for the battalion's upcoming field training exercise (FTX). (U.S. Navy photo by Mass Communication Specialist 1st Class Rosalie Chang) File# 170201-N-DH124-122