ARNOLD AIR FORCE BASE, Tenn. --   Kris Hughes, deputy base civil engineer for Arnold Air Force Base, speaks with Maj. Gen. C. McCauley von Hoffman, director of Logistics, Civil Engineering, Force Protection and Nuclear Integration, Headquarters Air Force Materiel Command, about the Primary Pumping Station during her visit to Arnold Air Force Base, Tennessee, Dec. 1, 2022. Arnold AFB is headquarters to Arnold Engineering Development Complex. (U.S. Air Force photo by Jill Pickett) (This image has been altered by obscuring a badge for security purposes.)