Secretary of the Air Force Frank Kendall, right, speaks with Arnold Engineering Development Complex Commander Col. Randel Gordon, directly to Kendall’s right, following his arrival at Arnold Air Force Base, Tenn., Oct. 4, 2023. During his visit to Arnold, headquarters of AEDC, Kendall observed some base operations, toured several facilities and received overviews of current and planned AEDC test capabilities. (U.S. Air Force photo by Keith Thornburgh)