190517-N-CU072-1108 GULF OF ALASKA (May 17, 2019) Master at Arms 2nd Class Caitlin Thomas, from Tucson, Ariz., talks on a sound-powered phone aboard the aircraft carrier USS Theodore Roosevelt (CVN 71) while participating in Exercise Northern Edge 2019. Northern Edge is one in a series of U.S. Indo-Pacific Command exercises in 2019 that prepares joint forces to respond to crisis in the Indo-Pacific region. (U.S. Navy photo by Mass Communication Specialist 3rd Class Sean Lynch/Released)