Airman 1st Class Abigail Biever, 56th Security Forces Squadron team member, renders a salute during the national anthem April 11, 2019, at Luke Air Force Base Ariz. Proper customs and courtesies require Airmen and base personnel in uniform to render a military salute at the first note of the anthem and maintain that position until the last note. (U.S. Air Force photo by Airman 1st Class Zoie Cox)