U.S. Army Col. William Benson, the commander of the 4th Brigade Combat Team, 1st Cavalry Division, presents Soldiers with challenge coins of excellence following the 27th Brigade Support Battalion casing of colors ceremony held on Bagram Air Field, July 24, 2013. The “Long Knife” Brigade based out of Fort Hood, Texas has been deployed to eastern Afghanistan for the last nine months serving as advisers to their Afghan National Security Force counterparts. They will be replaced by soldiers from the 4th Brigade Combat Team, 10th Mountain Division, based out of Fort Polk, La. (U.S. Army photo by Staff Sgt. Richard Andrade, Task Force Long Knife Public Affairs)