WCCO continues to look back on 100 years of history celebrating a century on-air.

In 1925, radio was still in its infancy. And for the first time ever, an American President was inaugurated in "real time" on the radio when Calvin Coolidge was sworn in. WCCO was one of the stations that carried the event an estimated 23 million people tuned in to hear. 

(The inauguration of Calvin Coolidge as the 30th President of the United States of America. Photo by Topical Press Agency/Getty Images,)