Courtesy Reuters

For a year now, Syrian President Bashar al-Assad has faced massive demonstrations calling for the end of his regime. Although his thugs have killed more than 8,000 of their own people and arrested and tortured far more, Syrians remain undeterred. Every day, they fight back, taking up arms to defend themselves and topple the tyrant. Most of the international community is on their side: Europe joined the United States and much of the Arab world in imposing stiff UN sanctions. Inside and outside the country, calls resound for a military intervention to help the rebels.

The United States must walk a fine line in Syria. On the one hand, should Assad and his regime fall, Washington and its allies would rejoice. Syria is Iran's oldest and closest Arab ally, has long opposed Israel, has backed Palestinian terrorist groups, and, at times, has aided anti-U.S. forces in Iraq. On the other

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  • DANIEL BYMAN is Professor of Security Studies at Georgetown University’s School of Foreign Service, Research Director at the Brookings Institution’s Saban Center for Middle East Policy, and the author, most recently, of A High Price: The Triumphs and Failures of Israeli Counterterrorism.
  • More By Daniel Byman