 Neither proposal has been approved by Congress.In 2019, District of Columbia mayor Muriel Bowser had dozens of 51-star flags installed on Pennsylvania Avenue, the street linking the U.S. Capitol building with the White House, in anticipation of a hearing in the U.S. House of Representatives regarding potential District of Columbia statehood.According to the U.S. Army Institute of Heraldry, the United States flag never becomes obsolete.