Syria; Brexit

Tonight on the program, a discussion about U.S. diplomats calling for strikes against Assad in Syria. Charlie is joined by Richard Haas, president of the Council on Foreign Relations, and Nicholas Burns, former undersecretary of state for political affairs and a professor at the Harvard Kennedy School.

Next, an update on the 'Brexit' with John Micklethwait, editor-in-chief of Bloomberg News.

We conclude with Cass Sunstein, whose latest book is called "The World According to Star Wars."