U.S. Army Rangers, assigned to Alpha Company, 3rd Battalion 75th Ranger Regiment, review documents found during a training mission at Fort Knox, Ky., April 20, 2014. Rangers are constantly training to maintain the highest level of tactical proficiency. The training was to ensure all Soldiers are proficient in warrior skills and tasks in preparation for their upcoming deployment. (U.S. Army Photo by Spc. Richard DeWitt/Released)