"We're doing more, because we need to do more because we need to defeat ISIL. I'm confident we will, but I want to accelerate that process," U.S. Defense Secretary Ashton Carter said in an interview with CNBC in Davos, Switzerland, where the annual economic forum takes place.
According to him, the coalition adheres to raid and bombing tactics to seize control of the routes connecting the two cities, as well as to cut off the communication between them. It will actually separate the Iraqi war theater from the Syrian one," the defense secretary said.
Carter did not rule out that the ground troops currently positioned in Syria and Iraq will be reinforced by fresh forces. At the same time, the Pentagon chief said that part of the anti-ISIS strategy was to mobilize available forces rather than replace them.
The senior U.S. official argued that air actions could not substitute ground campaign in the fight against ISIS controlling large areas within Syria and Iraq.
Russia has also been responsible for bombing and missile strikes in Syria torn by war over the past four years. The West is concerned about civilian casualties of Russian attacks, being confident Russia mainly seeks to support the regime of Syrian President Bashar al-Assad warring against the opposition rather than ISIS.