Senior Airman Hector Machado, left, and Senior Airman Albert Corona, air traffic controllers with the 75th Operations Support Squadron, man the tower at Hill Air Force Base, Utah, April 8, 2020. The tower's tight quarters make it difficult to maintain social distancing, which requires them to wear surgical masks and routinely sanitize the area. (U.S. Air Force photo by Cynthia Griggs)

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Photo by: Cynthia Griggs |  VIRIN: 200408-F-EF974-1053.JPG