Marine Corps Staff Sgt. Rogelio Villanueva, from left, Marine Corps 1st Lt. Michael Alvarado and Marine Corps Capt. Justin T. Gaines plot coordinates on a map during field training exercise No Easy Day on Camp Lejeune, N.C., Feb. 2, 2015. Villanueva is an operations chief, Alvarado is a platoon commander, and Gaines is an executive officer assigned to Bravo Battery, 2nd Low Altitude Air Defense Battalion. The exercise was conducted to test and increase the Marines efficiency and ability to engage an enemy aircraft. Marine Corps Staff Sgt. Rogelio Villanueva, from left, Marine Corps 1st Lt. Michael Alvarado and Marine Corps Capt. Justin T. Gaines plot coordinates on a map during field training exercise No Easy Day on Camp Lejeune, N.C., Feb. 2, 2015. Villanueva is an operations chief, Alvarado is a platoon commander, and Gaines is an executive officer assigned to Bravo Battery, 2nd Low Altitude Air Defense Battalion. The exercise was conducted to test and increase the Marines efficiency and ability to engage an enemy aircraft. SHARE: Download: Full Size (2.34 MB) Tags: Photo Essays Credit: VIRIN: 215340-N-QNS13-446.jpg Photo Gallery