OPTIC SCAN U.S. Marine Corps 1st Lt. William Kavanagh uses the optic lens on his M4 carbine to scan the area in the Kajak district of Afghanistan's Helmand province, Feb. 8, 2013. Kavanagh, a company executive officer, is assigned to Echo Company, 2nd Battalion, 7th Marine Regiment, Regimental Combat Team 7. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 850677-X-PRN71-788.jpg Photo Gallery