What could the 'next chapter' of the Syrian War look like?

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Newsweek contributing writer Janine di Giovanni said the world pays attention and "comes awake" to the Syrian crisis when Bashar al-Assad's regime uses chemical weapons against his citizens, but does not react as strongly when civilians have faced other atrocities over the last seven years. MSNBC's Ali Velshi and di Giovanni discuss what could happen next in the Syrian Civil War, who may be involved and why.