I thought Obama neither confirmed nor denied their use over there?
he did the ole 2 step HG, first when reports surfaced that France and Britain said they were certain, he said he was not convinced, then after the shit storm over IRS, NSA etc. etc. hit, all of sudden he announced he was convinced and he would do something about it...we're still waiting to see what that "Timeline" means....probably just what it meant the first time, squat. ....

Wag the dog bro....
The Obama administration has concluded that Syrian President Bashar Assad's government used chemical weapons against the rebels seeking to overthrow him and, in a major policy shift, President Obama has decided to supply military support to the rebels, the White House announced Thursday.
"The president has made a decision about providing more support to the opposition that will involve providing direct support to the [Supreme Military Council]. That includes military support," Deputy National Security Adviser for Strategic Communication Ben Rhodes told reporters.
President Obama has repeatedly said that the use of chemical weapons is a "red line" that, if crossed, would be a "game changer" for more U.S. involvement in the Syrian civil war.
"The President has been clear that the use of chemical weapons - or the transfer of chemical weapons to terrorist groups - is a red line for the United States," said Rhodes in a separate written statement.
"The President has said that the use of chemical weapons would change his calculus, and it has," he continued.
In terms of further response, Rhodes said,
"we will make decisions on our own timeline" and that Congress and the international community would be consulted. Mr. Obama is heading to Northern Ireland Sunday for a meeting of the G8 group of nations; Rhodes indicated the president will consult with leaders of those countries.
U.S.: Syria used chemical weapons, crossing "red line" - CBS News