"Putting military pressure on [ISIL] is always better, it's always easier when you are there on the ground, but in this case our President has made a decision and we are going to execute that and so it's my responsibility as the CENTCOM commander working with my chain of command to look at how we do that," adding that the completion of the U.S. pullout was "weeks away...but then again it will be driven by the situation on the ground".