U.S. Navy seaman from Naval Mobile Construction Battalion 5 measure the distance between two ends of a tent foundation, 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 strengthen defense capabilities, promote regional stability and dissuade potential and local conflict.