HOWITZER LOADED U.S. and Philippine Marines load M107 high explosive rounds into an M777A2 howitzer during an artillery shoot on Fort Magsaysay, Philippines, Oct. 25, 2011. The Marines are assigned to 2nd Battalion, 7th Marines, 31st Marine Expeditionary Unit, and provided familiarization training on the M777A2 howitzer as a part of Philippines-U.S. Amphibious Landing Exercise 2012. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 188676-Z-XBZ49-161.jpg Photo Gallery