180821-N-ZI635-230 CAMP SHELBY, Miss. (Aug. 21, 2018) A Seabee assigned to Naval Mobile Construction Battalion (NMCB) 133, explains his defensive fighting position to Capt. Tim DeWitt, commander of Naval Construction Group 2, during the battalions' field training exercise (FTX) at Camp Shelby, Miss. FTX provides a robust training environment where Seabee forces plan and execute multiple mission essential tasks including convoy security, force protection, and camp buildup prior to deployment. (U.S. Navy photo by Mass Communication Specialist 2nd Class George M. Bell/Released)