Aircraft sit on the flightline Oct. 17, 2015, at McConnell Air Force Base, Kan. More than 35 pilots flew aircraft onto the base to take part in the Midair Collision Avoidance seminar, which included briefings from the McConnell safety office, base leadership and a KC-135 Stratotanker static display. (U.S. Air Force photo by Senior Airman Trevor Rhynes)