Air Force Tech Sgt. Nicholas Pena instructs airmen while conducting an M249 squad automatic weapon, and M2 .50 caliber machine gun qualification course at Joint Base Elmendorf-Richardson, Alaska, Jan. 10, 2018. The airmen are security force officers assigned to the 673rd Security Forces Squadron, who conduct extensive training in law enforcement as well as combat tactics to protect military bases and assets both stateside and overseas. Air Force photo by Justin Connaher