A Block 45 variant of a U.S. Air Force KC-135 Stratotanker aircraft sits in front of a Block 40 variant of a KC-135 aircraft at Royal Air Force Mildenhall, England, Nov. 24, 2021. The 100th Air Refueling Wing received its first Block 45 model of the KC-135, which brings additional capabilities to the wing’s mission of delivering rapid air refueling throughout Europe and Africa. (U.S. Air Force photo by Senior Airman Joseph Barron)

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Photo by: Senior Airman Joseph Barron  |  VIRIN: 211124-F-PZ401-1107.JPG