OKINAWA, Japan (June 1, 2021) A Landing Craft, Air Cushion with Mobile Beach Unit 7, lands at White Beach, Okinawa, as part of joint exercise Poseidon's Watchtower. Poseidon's Watchtower is a multi-domain exercise designed to simulate the establishment of Expeditionary Advanced Base operations through joint service integration. (U.S. Navy photo by Mass Communication Specialist 2nd Class Evan Parker)