Free Syrian Army fighters fire at enemy positions during clashes with government forces in the Salaheddine district of Aleppo on Saturday. A U.N. envoy warns 100,000 Syrians could be killed next year if fighting continues. (Associated Press)

Free Syrian Army fighters fire at enemy positions during clashes with government forces in the Salaheddine district of Aleppo on Saturday. A U.N. envoy warns 100,000 Syrians could be killed next year if fighting continues. (Associated Press)