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