M4 Instruction
Senior Airman Sean Welch (left) instructs Airman Basic Adrienne Taylor on a mock M-4 rifle during defensive fighting position drills, Pease Air National Guard Base, New Hampshire, October 23, 2011. Airman Welch and Airman Taylor are assigned to the 157th Air Refueling Wing Student Flight here at Pease. (U.S. Air Force photo/Staff Sgt. Curtis J. Lenz)