Parts of Central London are locked down for a manhunt after a massive car bomb was found unexploded in the heart of the city. Such bombings were a part of life in London during many decades of so-called "Troubles" between Catholics and Protestants in Northern Ireland. One of the "outsiders" given credit for helping resolved what long seemed an intractable conflict is Tony Blair, who has just been named by the Quartet as a Special Envoy to the Middle East. Can the lessons of one intractable conflict be applied to the other? Does Blair have the authority to make a difference? Will American Jews play a supporting role the way Irish Americans did? Among our guests is former Senator George Mitchell, another "outsider" who helped shape what's now called the "Road Map" to end violence in the Middle East.