Soldiers from 1st Battalion, 18th Infantry Regiment, 2nd Advise and Assist Brigade, 1st Infantry Division, United States Division-Center, take part in the Combat Water Skills Test as part of a unit competition at Camp Taji, Iraq, May 27, 2011, for the opportunity to attend Ranger School. The competition included a 12-mile 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.