The End of the U.S.-Taliban Talks? with Jonathan Cristol

Despite progress over the last year, Donald Trump effectively ended the latest round of U.S.-Taliban negotiations with a tweet earlier this month. Will talks continue in a more understated way? Does this change anything on the ground in Afghanistan? And what is the Taliban doing in Moscow? Jonathan Cristol, author of "The United States and the Taliban before and after 9/11," discusses all this and more.