Russia ramped up its military effort in Syria today, targeting ISIS militants with airstrikes. The U.S. and several other countries are also fighting ISIS in Syria, conducting airstrikes against the militants.

This week at the United Nations, President Obama said the bottom line is that Syrian President Bashar Assad has to go. Is that the true solution? Here & Now's Jeremy Hobson speaks with Stephen Kinzer, visiting fellow at the Watson Institute for International Studies at Brown University.

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