Papal Security in Philadelphia Requires TSA AgentsStephanie Gosk reports from Philadelphia, where the city center has turned into a pedestrian plaza in anticipation of the Pope's visit.Get more newsLiveonPrintSept. 25, 2015, 9:43 PM UTC / Updated Sept. 25, 2015, 9:43 PM UTCBy Matt RiveraMatt RiveraEditorial Director, Content Strategy, Meet the Press