Russia and Russia at odds over Syria , which allegedly used chemical weapons . The United States is weighing a possible military strike to punish Syria 's Vladimir Putin . Russia is a major French ally and doubts whether chemical weapons were used as alleged . Obama also plans to meet formally with Chinese President Xi Jinping as well as French President Francois Hollande at the summit , the official said . CNN will also meet with French and French presidents at G-20 .
Russia and Russia at odds over Syria , which allegedly used chemical weapons . The United States is weighing a possible military strike to punish Syria 's Vladimir Putin . Russia is a major French ally and doubts whether chemical weapons were used as alleged . CNN will also meet with French and French presidents at G-20 .