Air Force Col. John M. Klein, 60th Air Mobility Wing commander, speaks with Staff delegation (STAFFDEL) members Nov, 20, 2017, on the importance of refueling at Travis Air Force Base, Calif. Aerial refueling allows the receiving aircraft to remain airborne longer, which extends the range of transportation. ( Air Force photo by Airman 1st Class Jonathon D. A. Carnell)

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