How real is the possibility of a terrorist strike in America this week? Today on The Gist, RAND’s Colin Clarke explains were terror cells are grown. We also speak with Plus Magazine editor Rachel Thomas and Marianne Freiberger about their book Numericon: A Journey Through The Hidden Lives of Numbers. For the Spiel, the teaming masses of Buddhist extremists who are bent on murdering civilians. Do they exist, or are they just a useful argument? Today’s sponsor: Stamps.com, Promo Code: TheGist