U.S. military service members stand at attention as Zach Kononov sings the national anthem, before the Denver Broncos Salute to Service game, at Empower Field at Mile High in Denver Nov. 3, 2019. Joint Service color guardsmen from all military branches, the Denver Police and Fire Departments, took the field during the anthem to honor the United States. (U.S. Air Force photo by Airman 1st Class Joshua T. Crossman)