Trigger Techniques A U.S. soldier, left, teaches a French Foreign Legion soldier how to properly operate an M4 carbine rifle at a firing range in Djibouti, March 5, 2016. Air Force photo by Tech. Sgt. Barry Loo SHARE IMAGE: Download Image: Full Size (1.9 MB) Tags: Soldiers, Army, Djibouti Photo By: Tech. Sgt. Barry Loo VIRIN: 160305-F-IJ878-546A.JPG Photo Gallery