Over a 30-year career, he has covered wars in Central America, the Middle East, and the former Yugoslavia, as well as major stories in the United States. He is a regular panelist on the PBS program Washington Week, a member of the Council on Foreign Relations, and a member of the Editorial Board at World Affairs Journal. His latest book, A Nation of Nations: A Great American Immigration Story, tells of the transformation of America during the last fifty years since the passage of the 1965 Immigration and Nationality Act.