150924-N-DH124-279 FORT HUNTER LIGGETT (Sept. 24, 2015) –Builder 1st Class Reginald Cyr, assigned to Naval Mobile Construction Battalion (NMCB) 4 relays the readings of an M256A1 chemical agent detector kit that can detect and identify blood, blister and nerve agents during a simulated Chemical, Biological and Radiological (CBR) drill in Fort Hunter Liggett, Calif., during the 2015 Field Training Exercise (FTX), Sept. 24. FTX prepares and tests the battalion’s ability to enter hostile locations, build assigned construction projects and defend against enemy attacks, using realistic scenarios. (U.S. Navy Photo by Mass Communication Specialist 1st Class Rosalie Chang/ Released)