Weapons Search Two combat engineers dig for weapons caches after receiving a metal hit with their mine detectors near the Euphrates River during Operation Koa Canyon, in Iraq, Jan. 23, 2006. The 22nd Marine Expeditionary Unit is conducting counterinsurgency operations in Al Anbar province alongside an Iraqi infantry battalion, collectively under the tactical control of the 2nd Marine Division. SHARE: Download: Full Size (0.14 MB) Credit: VIRIN: 413980-P-DFO66-332.jpg Photo Gallery