It makes no sense that Assad would gas his own people. It has also been reported that he has been "winning" (whatever that means) against the rebels. There's also a large contigent within the rebels that are said to be Al-Qaeda, which as you know, are said to have U.S. funding from time to time. Everything points to the acts being perpetrated by the rebels. This parellels to Irag (already mentioned) and is a good point to keep in mind. The U.S. and their allies are no stranger to deception to accomplish various goals. There are morons in the U.S. that still support Obomber, though. It's unbelievable.