REUTERS

"Russia is hoping common sense will prevail and Obama takes Putin's outstretched hand," said Elena Suponina, a senior Middle East analyst at the Institute of Strategic Studies, which advises the Kremlin. "But Putin will act anyway if this doesn't happen," the report says.

The U.S. is willing to discuss coordinating strikes to avoid hostile incidents with Russian planes, but America and its allies haven't received a "concrete" proposal from Moscow and won't include Assad's forces in the effort, an official in Washington said, speaking on condition of anonymity.