(NEWSER– Now that the US has determined that Bashar al-Assad's regime used chemical weapons, the Obama administration intends to help arm Syrian rebels, officials tell the New York Times. The US will send light arms and ammunition; antitank weapons are also a possibility. Rebel leaders have called for antiaircraft weapons, but Washington currently has no plans to send those, officials say. "The president has said that the use of chemical weapons would change his calculus, and it has," a top national security official tells the Washington Post.

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