ROUGH CUT - NO REPORTER NARRATION<br /> <br />STORY: U.S. President Barack Obama defied pressure from fellow world leaders to abandon plans for air strikes against Syria, leaving deep divisions on Friday at a summit which overshadowed efforts to revive the global economy.<br /> <br />Speaking in St. Petersburg, Russia on the final day of the meeting of emerging and developed nations, Obama said that the decision to make a military strike was a "tough choice" but added that failure to act against Syrian use of chemical weapons would embolden "rogue nations" to use similar weapons as well.<br /> <br />"I was elected to end wars, not start them," Obama said. "I've spend the last four and a half years doing everything I can to reduce our reliance on military power, but what I also know is that there are times where we have to make hard choices if we are going to stand up for the things we care about and I believe that this is one of those times."<br /> <br />Obama and Russian President Vladimir Putin, who hosted
