Two men try to extinguish a tire fire Thursday in Sitra, Bahrain, near the site of an opposition rally.Nightly clashes between riot police and protesters continued Thursday night nationwide. Hasan Jamali/AP hide caption

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Black smoke billowed from burning tents in Pearl Square in Manama, Bahrain, earlier today (March 16, 2011). Joseph Eid/AFP/Getty Images hide caption

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An unidentified man is carried to a vehicle to be taken to a hospital after being wounded during a demonstration in Manama, Bahrain, today (Feb. 18, 2011). AP hide caption

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