190521-N-EH218-1134 GULF OF ALASKA (May 21, 2019) Sonar Technician 3rd Class Carson Doyle, front, from Chattanooga, Tenn., and Sonar Technician 2nd Class Mathew Brown, from Portsmouth, N.H., monitor a sonar operator stack 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)