U.S. Air Force Col. Stephen Jost, 20th Fighter Wing commander, gives a brief to visiting civilian pilots during a General Aviation Fly-In event at Shaw Air Force Base, S.C., April 29, 2016. The event was intended for civilian and military pilots, along with air traffic controllers, to learn from each other on subjects such as mid-air collision avoidance. (U.S. Air Force photo by Airman 1st Class Kelsey Tucker)