150304-N-TC587-190 NAVAL SUPPORT ACTIVITY BAHRAIN (March 4, 2015) Indianapolis Colts quarterback Andrew Luck signs a photograph for a Sailor stationed at Naval Support Activity Bahrain during a USO-sponsored visit led by Vice Chairman of the Joint Chiefs of Staff Adm. James Winnefeld. Since January 2012, the USO has deployed more than 41 celebrity entertainers on more than 35 tours to more than 18 countries and more than 8 states, entertaining more than 129,000 troops and military families. (U.S. Navy photo by Mass Communication Specialist 2nd Class Damian Berg/released)