U.S. Census Bureau Daily Feature for August 20 -- WASHINGTON, Aug. 20, 2013 /PRNewswire-USNewswire/ -- WASHINGTON, Aug. 20, 2013 /PRNewswire-USNewswire/ -- Following is the daily "Profile America" feature from the U.S. Census Bureau: Profile America - Tuesday, August 20th. The nation's first licensed radio station began broadcasting in Detroit on this date in 1920 - station 8MK, now operating as WWJ. The station was owned by the Detroit News, and its daily program was called "Tonight's Dinner." For some convoluted reasons, the station operated with an amateur license, which in 1922 was changed to commercial. The first station to receive a commercial license was KDKA in Pittsburgh, which began broadcasting in October of 1920. From these rudimentary early broadcasts, the new medium grew rapidly. In 1922, there were 30 radio stations, but by the following year, there were 556. Now, there are more than 14,000 radio stations across the U.S. Profile America is in its 17th year as a public service of the U.S. Census Bureau. Sources: Kane's Famous First Facts, 6294 www.michiguid.com/history/am Statistical Abstract of the United States 2012, t.