are the constants? Israel and its West Bank settlements make the Arab World worry. And Iran and its nuclear program make Israel worry. With increased uncertainty in the Middle East, we all should worry. The Libyan domino probably won't knock over the Syrian domino. Why? Gaddafi only fell with the assistance of six months of NATO air strikes, which were critical to the rebel victory. There is no such appetite for similar action by NATO, the UN Security Council, or the Arab League in the case of Syria. Assad also has a professional army and an iron grip on his inner political circle. No Gaddafi-like defections here to give strength to the insurgency. He will be difficult to pry loose even as the streets of Syria turn red with the blood of its citizens. This is a tough question. The answer would depend (the regime hasn't collapsed just yet) on the ability and willingness of Assad's opponents to hang together. If it becomes Sunni vs. Shia/Alawite, there would be a real temptation of outsiders to intervene.