A soldier with 1st Battalion, 18th Infantry Regiment, 2nd Advise and Assist Brigade, 1st Infantry Division, United States Division-Center, makes his way along the course of a 12-mile ruck march as part of a unit competition at Camp Taji, Iraq, May 27, 2011, for the opportunity to attend Ranger School. The competition included the ruck march as well as testing on weapons tasks, map reading and other tactical skills and was designed to give the prospective Ranger candidates a small taste of the physical and mental requirements of Ranger School.