McGurk, the United States’ new envoy to the coalition it leads against Islamic State, speaks to reporters during a news conference at the U.S. embassy in the heavily fortified Green Zone in Baghdad

Brett McGurk, the United States' new envoy to the coalition it leads against Islamic State, speaks to reporters during a news conference at the U.S. embassy in the heavily fortified Green Zone in Baghdad, Iraq, December 9, 2015. REUTERS/Thaier Al-Sudani