U.S. Air Force Col. Derek Salmi, 92nd Air Refueling Wing commander, uses an interactive presentation to address Airmen during a base all-call at Fairchild Air Force Base, Washington, Sept. 26, 2018. All-calls are often used by senior leadership to address large numbers of base personnel for pressing or widely-applicable topics. (U.S. Air Force photo/Senior Airman Ryan Lackey)

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Photo by: Senior Airman Ryan Lackey |  VIRIN: 180926-F-HU835-040.JPG