WATER WALK - Alf, a 3-year-old German shepherd, goes through the wall of water on the dog walk obstacle in the obedience course, June 11, 2008, during the 2008 U.S. Army Europe Military Working Dog Competition on Miesau Army Depot in Kaiserslautern, Germany. Alf is assigned to the 230th Military Police Company in Miesau, Germany.U.S. Army photo by Christine June