Four U.S. Air Force F-22 Raptors and a KC-135 Stratotanker, assigned to the 434th Air Refueling Wing, Grissom Air Reserve Base, Ind., conduct aerial refueling over the continental United States, Aug. 21, 2018, during the Northern Lightning 18-2 exercise. Northern Lightning is one of seven Air National Guard joint accredited exercises held at a Combat […]