Why is it a business of the United States to 'show resolve' in Syria at all is beyond me, but I'm willing to take the position, that because the US was instrumental in fomenting the civil war and aiding/abetting various rebel groups against the government there (uninvited I might add), it has at least the moral responsibility to contribute to the resolution (a peaceful one) of that crisis.
As for the 'gas attack'  itself - it is of course an atrocity, but still no tangible evidence or proof of who committed it and how it happened, therefore assigning blame automatically to one side is suspect.
Heart-wrenching videos and images of dead, or injured children while very powerful are not a substitute.
Attempts to turn this tragedy into a propaganda coup is beneath contempt.
Shame on the media to lap it up.