That last bit is the key. A UNSC resolution won’t work because Assad is, of course, a Russian client and Russia will veto the resolution. An NFZ needs to be done through other means; this is what they’ve come up with. And note: This does mean that we’re on the brink of a proxy war with Russia, or maybe even something slightly more. What happens if one of those advanced anti-aircraft missiles given by Moscow to Assad ends up blowing a U.S. jet out of the sky?
By Voice of America News: Scott Bob report from Azaz, Syria. [Public domain], via Wikimedia Commons