9/2 holiday 9/3 freebie 9/4 It's supposed to be a summit about the global economy, but the debate over possible military strikes for Syria's apparent use of chemical weapons is already overshadowing the G-20 conference this week.The meeting in Russia will pit two leaders with polar opposite views on Syria -- U.S. President Barack Obama, who wants to launch limited military strikes against the Syrian regime, and Russian President Vladimir Putin, whose country stands by its longtime ally in the Middle East. 9/5 9/6 President Barack Obama and his Russian counterpart, Vladimir Putin, said they held "constructive" talks Friday on the deeply divisive issue of Syria on the sidelines of the Group of 20 summit in Russia.The two leaders hold opposing views over whether military action should be taken against the Syrian government over its alleged use of chemical weapons on its own people.