On this date in 1920, the first commercial radio station went on the air. Where was it, and why was the date so significant? And in 1983, President Ronald Reagan signed a bill into law creating a national holiday to commemorate the life of someone. Find out who it was on this installment of Mark's Almanac.
Mark Pennell sits at the helm of his time machine.Mark's Almanac is a 90-second time travel that highlights the world's history from the very serious to the sometimes sublime.