A U.S. Air Force B-1B Lancer, assigned to the 28th Bomb Wing, Ellsworth Air Force Base, S.D., and a KC-135 Stratotanker, assigned to the 914th Air Refueling Wing, Niagara Falls Air Reserve Station, N.Y., conduct aerial refueling over the continental United States on Dec. 10, 2018. The Lancer serves