Marines provide supportive fire with the AT-4 shoulder-fired rocket launcher as part of movement-to-contact training during Exercise Iron Fist 2013 at aboard Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Jan. 31, 2013. Marines provide supportive fire with the AT-4 shoulder-fired rocket launcher as part of movement-to-contact training during Exercise Iron Fist 2013 at aboard Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Jan. 31, 2013. SHARE: Download: Full Size (2.01 MB) Tags: photo essays Credit: VIRIN: 090003-L-OBB37-746.jpg Photo Gallery