U.S. Marines conduct a riot control drill. U.S. Marines of the 11th Marine Expeditionary Unit conduct a riot control drill on board the USS Tarawa (LHA 1) while under way in the Pacific Ocean on Nov. 24, 2007. Tarawa and embarked 11th MEU are on a regularly scheduled deployment. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 532613-E-VLO25-110.jpg Photo Gallery