170516-N-XJ502-037 FORT HUNTER LIGGETT, Calif. (May 16, 2017) Chief Intelligence Specialist Luciano Perez left, and Electrician’s Mate 1st Class Christopher Demo, both assigned to Coastal Riverine Group (CRG) 1, control and monitor the video feed from an Unmanned Aircraft System 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)