On GPS this Sunday at 10 a.m. and repeated at 1 p.m., a special live show with expert analysis and discussion of the lessons and implications of this week’s terrorist attack in Boston.

First, Fareed speaks with New York Police Commissioner Raymond Kelly.

Also on the show: Stephen Flynn, founding co-director of the George J. Kostas Research Institute for Homeland Security at Northeastern University, Philip Mudd, a senior research fellow at the New America Foundation, Harvard School of Public Health fellow Jessica Stern and Wall Street Journal columnist Bret Stephens.