Col. E. John Teichert, 11th Wing and Joint Base Andrews commander, welcomes Brig. Gen. Kevin Huyck, NATO Headquarters Allied Air Command deputy chief of staff operations, before a UH-1N Iroquois flight with the 1st Helicopter Squadron at Joint Base Andrews, Md., Sept. 18, 2016. They arrived in the U.S. for the semi-annual NATO Air Chiefs Symposium to discuss air and space power.