Colonel Anthony Cook, System of Cooperation among the American Air Forces secretary general, speaks during the South American Air Chiefs conference at Davis-Monthan Air Force Base, Ariz., Nov. 1, 2017. South American Air Chiefs or their representatives shared information on their Air Force’s unique capabilities and challenges during the 12th Air Force (Air Forces Southern) hosted three day conference. (U.S. Air Force photo by Staff Sgt. Angela Ruiz)