Secretary of the Air Force Frank Kendall, Air Force Chief of Staff Gen. CQ Brown, Jr., Chief Master Sgt. of the Air Force JoAnne S. Bass, Gen. John E. Hyten, vice chairman of the Joint Chiefs of Staff and Senior Airman Alexis Hill, the youngest Airman present, stand at attention for the national anthem during the Air Force’s 74th birthday celebration at the Pentagon, Arlington, Va., Sept. 17, 2021. (U.S. Air Force photo by Eric Dietrich)