AdvertisementOpinionNORAD's Santa Tracker began with a typo and a good sportDecember 19, 2014NPR StafffacebookEmailTerri Van Keuren (from left), Rick Shoup and Pamela Farrell, children of Col. Harry Shoup, commander of the Continental Air Defense Command, visited StoryCorps in Castle Rock, Colo., to talk about how their dad helped to create the U.S. military's Santa Tracker. (StoryCorps)