170202-N-DH124-096 PORT HUENEME, Calif. (Feb. 2, 2017) - Builder Constructionman Dustin Coleman (left), assigned to Naval Mobile Construction Battalion (NMCB) 4, communicates the Chemical, Biological and Radiological (CBR) response teams’ location after a simulated chemical attack during Command Post Exercise (CPX) 3, Feb. 2. The intent of CPX is to establish command, control, communication, computer and intelligence infrastructure to prepare for the battalion’s upcoming field training exercise (FTX). ( Navy photo by Mass Communication Specialist 1st Class Rosalie Chang/Released)

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