The Boeing KC-46 Pegasus is an American military aerial refueling and strategic military transport aircraft developed by Boeing from the Boeing 767 jet airliner. In February 2011, the tanker was selected by the United States Air Force (USAF) as the winner in the KC-X tanker competition to replace older Boeing KC-135 Stratotankers. The first aircraft was delivered to the USAF in January 2019, and it intends to procure 179 Pegasus aircraft by 2027. In this photograph, a KC-46A Pegasus refuels a Lockheed Martin F-35 Lightning II over California.Photograph credit: Ethan Wagner