Only the willfully blind (and a complicit corporate media) could believe an Assad now winning against US-funded "rebels" (jihadists) would risk using chemical weapons knowing this would only serve as a perfect pretext for Washington to step up its efforts to topple him. 

"I guarantee that will have enormous positive reverberations" - Netanyahu in 2002 urging US lawmakers to invade Iraq. The wily "Bibi" merely neglected to mention these would be for Israel, with its enemies unseated and their countries in ruins. If deceiving Americans worked in 2002, why not 2017?