Howitzer Fire Marines fire an M777 howitzer during Exercise Northern Steel on Camp Lejeune, N.C., Dec. 3, 2018. The exercise combines elements of the Marine Air-Ground Task Force to build combined combat power, ensuring maximized readiness for potential global contingencies. SHARE: Download: Full Size (1.73 MB) Tags: Marine Corps Credit: Marine Corps Cpl. Melanye Martinez VIRIN: 181203-M-MS784-1032X.JPG Photo Gallery