U.S. Navy Utilitiesman 1st Class Joseph McCarty fills his canteen with water from a water bull container during a field training exercise at Camp Shelby, Miss., March 13, 2012. The training exercise challenges the all of the skills of McCarty and his fellow sailors assigned to Naval Mobile Construction Battalion 74 in a tactical environment. (U.S. Navy photo by Mass Communication Specialist 2nd Class Michael Lindsey/Released)