U.S. Navy Seaman Jeffrey Dimon, right, helps U.S. Navy Petty Officer 1st Class Baltazar Perez, center, load ammo into an M-240B machine gun while participating in marksmanship training on Camp Leatherneck, Helmand province, Afghanistan, June 1, 2013. Dimon, a construction mechanic, and Perez, a builder, are assigned to Naval Mobile Construction Battalion 15's convoy security element. U.S. Navy Seaman Jeffrey Dimon, right, helps U.S. Navy Petty Officer 1st Class Baltazar Perez, center, load ammo into an M-240B machine gun while participating in marksmanship training on Camp Leatherneck, Helmand province, Afghanistan, June 1, 2013. Dimon, a construction mechanic, and Perez, a builder, are assigned to Naval Mobile Construction Battalion 15's convoy security element. SHARE: Download: Full Size (2.84 MB) Tags: Photo Essays Credit: VIRIN: 410737-N-BZN80-751.jpg Photo Gallery