John O'Sullivan discussed his book, The President, the Pope, and the Prime Minister: Three Who Changed the World, published by Regnery Publishing. Interviewed by Mr. Walker, Mr. O'Sullivan described the fall of the Soviet empire and the central roles played by President Reagan, Pope John Paul II, and Prime Minister Margaret Thatcher. He covered the Reagan presidency as a journalist and served as a special adviser to Prime Minister Thatcher. Martin Walker also is a senior fellow at the Woodrow Wilson Center.