The NATO Air Chiefs’ plane is ushered in after arriving 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.

Maj. Gen. Laurian Anastasof, Romanian Air Force Chief of Staff, is greeted by U.S. Air Force leadership upon arrival 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.

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.

NATO Air Chiefs watch a safety video before a UH-1N Iroquois flight with the 1st Helicopter Squadron on 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.

Pilots with the 1st Helicopter Squadron prepare the aircraft for a flight with the NATO Air Chiefs 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.

NATO Air Chiefs pose for a photo after 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.