U.S. Army Staff Sgt. Martin Sierra, Combined Joint

U.S. Army Staff Sgt. Martin Sierra, Combined Joint Task Force-Horn of Africa Civil Affairs, and his team compete in the swim portion of a mud run hosted by the French military in Djibouti, Djibouti, Nov. 6, 2016. The event allowed coalition forces from France, Japan, and the United States to interact and build camaraderie while navigating a five kilometer course. The French 5th Marine Regiment team took first place. Combined Joint Task Force-Horn of Africa is a multinational effort to conduct theater security cooperation, combat violent extremism and enable freedom of movement within East Africa in order to defend U.S. interests and support aligned regional efforts. (U.S. Air National Guard photo by Staff Sgt. Penny Snoozy)