In this citizen journalism image provided by the Media Office Of Douma City, which has been authenticated based on its contents and other AP reporting, a Syrian man mourns over a dead body after an alleged poisonous gas attack fired by regime forces, according to activists, in Douma town, Damascus, Syria, Wednesday, Aug. 21, 2013. (AP Photo/Media Office Of Douma City)

Escalation Feared In Syria Amid Threats Over Ongoing Chemical Strike Investigation

The U.S. has already distanced itself from a U.N. investigation of an alleged chemical weapons attack, as regional war looms.