ENERGY TARGET Marine Corps Cpl. Justin M. Goodchild, right, assists Pfc. Luis A. Chavez with locating a simulated enemy target during ground-based air defense training on Marine Corps Outlying Field Atlantic, N.C., Feb. 3, 2015. Goodchild and Chavez are low-altitude air defense gunners assigned to 2nd Low Altitude Air Defense Battalion. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 558120-C-FOD34-383.jpg Photo Gallery