What if the U.S. Doesn't Intervene in Syria?

What will unfold in Syria if the Obama administration persists with its policy of providing humanitarian and other non-lethal aid while standing back from the fighting? The most likely scenario is that Syria fractures along sectarian lines. An al-Qaeda affiliate, Jabhat al-Nusra, is already consolidating control over a swath of northeastern Syria; remnants of the regime, backed by Shiite fighters from Lebanon’s Hezbollah movement, could take over a strip of the western coastline.