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President Obama is spending another day in Russia, at the G20 summit.
Aides say he's making his case against Syria to fellow world leaders. Not including summit host Vladimir Putin.
The Russian president strongly opposes attacks. Syria is one of Russia's top Mideast allies.
Complicating the issue is a disturbing new look at the Syrian Rebels.
An image taken from a video that shows rebel fighters preparing to execute captured government soldiers was spread across the front page of yesterday's New York Times.
It's pictures like this that may make it tough for the Obama administration to sell supporting the rebels.