A U.S. Air Force UH-1N Iroquois with the 54th Helicopter Squadron, Minot Air Force Base, North Dakota, hovers over the Turtle Mountain State Forest, North Dakota, Feb. 14, 2018, during a 91st Security Forces Group field training exercise. During the exercise, defenders vectored the aircraft to a landing zone and performed a simulated medical evacuation. (U.S. Air Force photo by Senior Airman J.T. Armstrong)