Gen. Dempsey, chairman of the Joint Chiefs of Staff, said US advisers should be deployed to Iraq’s Anbar province, where Iraqi troops are battling the advance of the Islamic State. US officials said that the rate of foreign fighters flowing into Syria, about 1,000 per month, is remaining constant; this appears to be the case despite the US air campaign against the Islamic State in Syria and US requests to Turkey to help stem the flow of foreign fighters. US officials also said that 20 to 30 former Gitmo detainees have joined the Islamic State or other jihadist groups in Syria. Donald Ray Morgan, 44, of North Carolina, was charged with attempting to join a terrorist organization; in August he had tried to travel to Syria to join the Islamic State.