A U.S. Congressional committee has issued a subpoena to question President Donald Trump's special Afghanistan envoy, Zalmay Khalilzad, next week after peace talks with the Taliban abruptly ended. Photo: Omar Sobhani/Reuters https://t.co/GS3caYhzP7 pic.twitter.com/fH3tIUirRt— Radio Free Europe/Radio Liberty (@RFERL) September 13, 2019