170516-N-XJ502-023 FORT HUNTER LIGGETT, Calif. (May 16, 2017) Electrician’s Mate 1st Class Zachariah Doney, assigned to Coastal Riverine Group (CRG) 1, assembles an Unmanned Aircraft System for aerial imagery during NMCB 4’s field training exercise (FTX). The FTX prepares and tests the battalion’s ability to enter hostile locations, build assigned construction projects and defend against enemy attacks using realistic scenarios while being evaluated by Naval Construction Group 1. (U.S. Navy photo by Utilitiesman 2nd Class Jasmine Flores/Released)