B-1B Lancer bomber conducts aerial refuelling mission with KC-46A 21 May 2021 (Last Updated May 21st, 2021 09:46) The USAF’s B-1B Lancer bomber has successfully conducted a refuelling mission with KC-46A Pegasus. Share Article Maintenance professionals conduct a preflight inspection and prepare a KC-46A Pegasus for a mission to refuel a B-1B Lancer. Credit: USAF / Senior Airman Alexi Bosarge. A US Air Force’s 37th Bomb Squadron (BS) B-1B Lancer has performed a refuelling mission with a KC-46A Pegasus strategic military tanker and transport aircraft. The Boeing-manufactured KC-46A that took part in the mission was from the 344th Air Refueling Squadron at McConnell AFB in Kansas.