20 May 2015 Foreign Military Leaders Observe U.S. Marine Corps Amphibious Landing during U.S. Pacific Command Amphibious Leaders Symposium Representatives from 22 nations observed an amphibious landing by the 15th Marine Expeditionary Unit May 19, 2015. Amphibious Assault Vehicles launched from the USS Rushmore (LSD 47).The landing is part of U.S. Pacific Fleet’s Culebra Koa 15, an on-going joint sea-basing exercise taking place in