190521-N-EH218-1187 GULF OF ALASKA (May 21, 2019) Sonar Technician 2nd Class Mathew Brown, left, from Portsmouth, N.H., and Sonar Technician 2nd Class Josh Essick, from Harrisburg, Pa., monitor sonar operator stacks aboard the Arleigh Burke-class guided-missile destroyer USS Kidd (DDG 100) 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 1st Class Ryan J. Batchelder/Released)