Harold Camping, a radio preacher from California, became known for predicting the end of the world as May 21, 2011. The then 90-year-old preacher was so convinced of his message that he invested nearly $100 million into an advertising campaign to spread the news. While his predictions were declared heretical by millions of other believers, and Camping died in 2013, a small remnant of listeners remain interested in his teachings, broadcast on a new radio station.