How was gas provided and from where. How was it disseminated without aircraft, rockets and artillery. Have you any idea how difficult it is to work with chemical weapons. Several different chemicals have to be mixed together. Full hazmat suites and special gas masks have to be used. It has to be loaded into shells or surface to surface rockets. Doubtful the rag tag rebels could have been responsible for this outrage.
26-year-old sustains serious injuries in Tel Aviv stabbing (Haaretz)
from the article: A game-changer for Assad, even if there is no U.S. strike