161103-N-XK513-053 FORT HUNTER LIGGETT, Cali. (Nov. 3, 2016) Petty Officer 1st Class David Cepeda and Petty Officer 2nd Class Justin Potts with Naval Mobile Construction Battalion 18 (NMCB 18) clear debris from defensive perimeter firing lanes during a field training exercise (FTX). NMCB 18 is participating in this FTX to maintain deployment readiness. (U.S. Navy Photo By Petty Officer 2nd Class Ian Carver/Released)