According to U.S. Air Force instructions and Army regulations, when “The Star-Spangled Banner” is played, military members in uniform must render a hand salute if outdoors, and stand at attention if indoors. All civilians, as well as Service members who are present but not in uniform, should remove any headgear, and place their right hand over their heart. (U.S. Air Force photo by Airman 1st Class Teresa Aber/Released)