PACIFIC OCEAN (Sept. 21, 2021) Lt. Grant Kelley, from Roanoke, Va., left, and Lt. John R. Morgan III, from Detroit, coordinate anti-submarine warfare (ASW) operations in the combat information center aboard the Arleigh Burke-class guided-missile destroyer USS Mustin (DDG 89), Sept. 21, 2021, during Silent Forces Exercise 2021 (SIFOREX). SIFOREX is a Peruvian naval exercise that focuses on ASW proficiency. It provides a unique opportunity for naval forces to conduct ASW operations against multiple diesel submarines in a complex environment. (U.S. Navy photo by Mass Communication Specialist 2nd Class James S. Hong)