Syria in limbo between peace and war

Ceasefires in Syria have come and gone in the past. But this one has cut fighting and reduced casualties. And it's backed by possible joint military action by Russia and the US - the first time they've worked together in this way since the second world war.
Photo: Government soldiers walk through ruins in the government-held side of Aleppo, in Syria.
Credit: Youssef Karwashan/AFP/Getty Images