Mosul is surrounded. Raqaa is surrounded. The fighters in those places will have a hard time "escaping." They can fight to the death or surrender. My guess is there will be plenty of p-o-ws.
The thing to worry about is the ISIS sympathizers who are still in Europe who will/may say "fuck it. May as well go out in a blaze of glory." That is a valid concern.
The thing to worry about is the ISIS sympathizers who are still in Europe who will/may say "fuck it. May as well go out in a blaze of glory." That is a valid concern.