Battle for Aleppo: Syrian civil war may get much worse - CNN.com

(CNN)Aleppo's fall to rebels -- back in 2012 a much more moderate bunch than the often al-Nusra-infected alliances we see now -- was a symbolic moment: the commercial heart of Syria turning on the country's own government.

Now, as thousands flee to the Turkish border from Russian airstrikes pounding the city and government forces moving in, the battle for Aleppo is again gaining significance.