SUNSET SCAN A U.S. Marine uses his weapon's optic lens to scan the mountaintops at sunset from a guard post on Observation Post Athens in Afghanistan's Helmand province, Nov. 28, 2013. The Marine is assigned to 3rd Battalion, 7th Marine Regiment, which provided security for personnel on Forward Operating Base Zeebrugge. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 372787-W-FKK74-188.jpg Photo Gallery