Joel Engardio's essay "Learning True Tolerance" was originally broadcast on NPR's Weekend Edition Sunday November 25, 2007 as part of the "This I Believe" series. Joel's essay was selected for a printed "best of " anthology published in 2008 by Macmillan/Henry Holt & Co. It was also released as an audio book on DVD. The essay was inspired by the making of Engardio's documentary film Knocking.