U.S. Marines assigned to Marine Corps Security Force Company Guantanamo Bay, lead students from W.T. Sampson Elementary school on a practice surveillance "mission" during Little Devil Dog Day at Naval Station Guantanamo Bay, Cuba, June 6, 2014. Little Devil Dog Day is an annual event where base Marines and elementary school officials coordinate a day of themed activities for base first-graders. (U.S. Navy photo by Mass Communication Specialist 2nd Class Scott Pittman/Released)