Why the Syrian cease-fire probably won’t work -Washington Post

“Syrian opposition groups cautiously welcomed the deal reached by world powers at a meeting in Munich on Thursday but said they were concerned that it allows Russia to continue its air campaign against the Islamic State and Jabhat al-Nusra terrorist groups — and perhaps also against moderate rebels.

The deal marks the first attempt to bring about any kind of pause to the fighting since a U.N.-backed cease-fire in 2012 collapsed within hours, and world leaders expressed hope that this agreement would herald the beginning of an end to the nightmarish war.

But many key details remain unaddressed, including when exactly the truce will begin, who will enforce it and whether the factions on the ground will accept it.”