Chiefs and officers man an M-240B machine gun and M-16 rifle in a fox hole on the defensive line during a joint chief and office

110330-N-7716W-003
CAMP SHELBY, Miss. (March 30, 2011) Chiefs and officers assigned to Naval Mobile Construction Battalion (NMCB) 24 and NMCB-27 man an M-240B machine gun and M-16 rifle in a fox hole on the defensive line during a joint chief and officer field exercise. The 20th Seabee Readiness Group from Naval Construction Battalion Center in Gulfport, Miss., is conducting the exercise. (U.S. Navy photo by Hospitalman 2nd Class Collin Wiseman/Released)

110330-N-7716W-003
 CAMP SHELBY, Miss. (March 30, 2011) Chiefs and officers assigned to Naval Mobile Construction Battalion (NMCB) 24 and NMCB-27 man an M-240B machine gun and M-16 rifle in a fox hole on the defensive line during a joint chief and officer field exercise. The 20th Seabee Readiness Group from Naval Construction Battalion Center in Gulfport, Miss., is conducting the exercise. (U.S. Navy photo by Hospitalman 2nd Class Collin Wiseman/Released)