In the absence of such evidence, Damascus and its ally Russia have aggressively pushed another scenario: that rebels carried out the Aug. 21 chemical attack. Neither has produced evidence for that case, either. That's left more questions than answers as the U.S. threatens a possible military strike.
The early morning assault in a rebel-held Damascus suburb known as Ghouta was said to be the deadliest chemical weapons attack in Syria's 2½-year civil war. Survivors' accounts, photographs of many of the dead wrapped peacefully in white sheets and dozens of videos showing victims in spasms and gasping for breath shocked the world and moved President Barack Obama to call for action because the use of chemical weapons crossed the red line he had drawn a year earlier.
Yet one week after Secretary of State John Kerry outlined the case against Assad, Americans — at least those without access to classified reports — haven't seen a shred of his proof.
