Should the US Arm Syrian Rebels?

After just three weeks as Secretary of State, John Kerry is trying to prevent Syria's "bloody stalemate" from disrupting the world's most volatile region. Russia, Hezbollah — and especially Iran — are aiding the Assad regime while America's refusal to arm opponents is seen as betrayal. Saudi Arabia is reportedly sending Croatian weapons to anti-government forces, who saved Kerry embarrassment by agreeing to show up at a meeting later this week. With 70,000 Syrians already dead and 850,000 turned into refugees, is there any hope of stopping the carnage any time soon?