Anxiety is increasing about the prospect of a desperate Bashar al-Assad using chemical weapons against his rapidly proliferating enemies. Secretary of State Hillary Clinton warned Assad that such chemical weapons use would cross a U.S. red line: "I'm not going to telegraph in any specifics what we would do in the event of credible evidence that the Assad regime has resorted to using chemical weapons against their own people. But suffice to say we are certainly planning to take action."

The U.S. is not the only country worried about the possible use of chemical weapons. Intelligence officials in two countries told me recently that the Israeli government has twice come to the Jordanian government with a plan to take out many of Syria's chemical weapons sites. According to these two officials, Israel has been seeking Jordan's "permission" to bomb these sites, but the Jordanians have so far declined to grant such permission.

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