Syrian force says it has enough fighters to take Raqqa from Islamic State

By Tom Perry and John DavisonBEIRUT/MOSUL, Iraq (Reuters) - U.S.-backed Syrian militias said on Friday they were strong enough to seize Raqqa from Islamic State with support from the U.S.-led coalition, underlining their opposition to any Turkish role in the planned attack.The campaign against the city, Islamic State's Syrian base of operations, is gathering pace as Iraqi forces press ahead with their efforts to recapture Mosul, the jihadists' base in Iraq.The overlapping U.S.-backed campaigns t