U.S. Navy Seaman Zach Walker, Naval Mobile Construction Battalion 5 steel worker constructionman and native of Houston, uses a circular saw to cut through the floorboards on a tent, Sept. 9, 2011. Both the U.S. Army and Navy used their skills and manpower to construct numerous tents across Camp Lemonnier. The Combined Joint Task Force - Horn of Africa, under the command of U.S. Africa Command, conducts civil and non-combatant military operations in East Africa aimed to strengthening defense capabilities, promote regional stability and dissuade potential and local conflict.