JOINT BASE PEARL HARBOR-HICKAM (June 3, 2021) -- Family members wave as the Virginia-class fast-attack submarine USS Missouri (SSN 780) departs Joint Base Pearl Harbor-Hickam for Exercise Agile Dagger 2021 (AD21). AD21 is a training exercise, with one-third of the Pacific Submarine Force getting underway, to assess warfighting readiness and build capacity for the joint force. (U.S. Navy photo by Mass Communication Specialist 1st Class Michael B. Zingaro/Released)