MOSCOW - It was the largest city in Syria before the war, and for years has been a main rebel stronghold. Now, a defining battle is looming for Aleppo.
CNN: What does Russia want in Syria? 5 reasons Putin backs Assad
Syrian refugees are pictured in a camp as Syrians fleeing the northern embattled city of Aleppo wait on Feb. 6, 2016 in Bab al-Salama, near the city of Azaz, northern Syria, near the Turkish border crossing.
