This Sunday, Dec. 14, 2014 photo provided by the anti-government activist group Syrian Observatory for Human Rights, which has been authenticated based on its contents and other AP reporting, shows Jihadi fighters from the al-Qaida-linked Nusra Front and other rebel factions, rest after clashes with Syrian troops in Wadi Deif in the northwestern province of Idlib, Syria. (AP Photo/Syrian Observatory for Human Rights)