Crew chiefs for the Black Eagles demonstration team stand behind the T-50B aircraft as the pilots conduct their pre-flight checklist prior to a show at the Sacheon Airshow at Sacheon Base, Republic of Korea, Oct. 21, 2016. 7th Air Force provided both an F-16 and A-10 Thunderbolt II static display for the four-day airshow, showcasing U.S. Air Force capabilities to over 260,000 attendees. (U.S. Air Force photo by 1st Lt. Lauren Linscott/Released)