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Tens of thousands of Bahraini anti-government protesters march Friday, March 4, 2011, from the main government house in the capital of Manama, Bahrain, to the Pearl roundabout, where they have set up camp. Also on Friday, thousands of anti-government demonstrators streamed toward headquarters of Bahrain's state television hours after sectarian clashes between Sunnis and the majority Shiites who are leading protests in the strategic Gulf nation. (AP Photo/Hasan Jamali)

Thousands of Bahraini Shiite protesters march during an anti-regime demonstration in the capital Manama. A Bahraini Shiite opposition leader called for Sunni-Shiite harmony on Friday as thousands of protesters marched in Manama, a day after residents of a town south of the capital reported sectarian clashes.(AFP/Adam Jan)

Female anti-government protesters shout slogans as they protest in front of the main gate of the Information Affairs Authority headquarters in Isa Town, south of Manama March 4, 2011. Reuters/Hamad I Mohammed

Female anti-government protesters shout slogans during a demonstration in front of the main gate of the Information Affairs Authority headquarters in Isa Town, south of Manama, March 4, 2011. Reuters/Hamad I Mohammed

Woman anti-government protesters hold a banner that reads "As Long As We are Breathing Khalifa is Leaving" as they protest in front of the main gate of Bahrain's Information Affairs Authority headquarters in Isa Town, south of Manama March 4, 2011. Reuters/Hamad I Mohammed

- Anti-government protesters hold hands as they stand outside the main gate of the Information Affairs Authority headquarters in Isa Town, south of Manama March 4, 2011. Reuters/Hamad I Mohammed

Anti-government protesters shout slogans as they carry a banner that reads "Revolution" outside the Information Affairs Authority headquarters in Isa Town, south of Manama March 4, 2011. Reuters/Hamad I Mohammed

Anti-government protesters stand guard in front of the main gate of the Information Affairs Authority as thousands of Shi'ites protested at the headquarters of the ministry in Isa Town, south of Manama March 4, 2011. Reuters/Hamad I Mohammed

Thousands of Shi'ites march towards the Foreign Ministry during an anti-government protest held in Manama March 4, 2011. Reuters/James Lawler Duggan

Tens of thousands of Bahraini anti-government protesters march Friday, March 4, 2011, from the main government house in the capital of Manama, Bahrain, past the financial district to the Pearl roundabout, where they have set up camp. Images of King Hamad bin Isa Al Khalifa and Prime Minister Khalifa Al Khalifa (mostly obscured) are seen on the bank building at right. Also on Friday, thousands of anti-government demonstrators streamed toward headquarters of Bahrain's state television hours after sectarian clashes between Sunnis and the majority Shiites who are leading protests in the strategic Gulf nation. (AP Photo/Hasan Jamali

Tens of thousands of Bahraini anti-government protesters march Friday, March 4, 2011, from the main government house in the capital of Manama, Bahrain, to the Pearl roundabout, where they have set up camp. The signs read: 'No Sunni, no Shia, we are all Bahraini' and 'Down with the government.' Also on Friday, thousands of anti-government demonstrators streamed toward headquarters of Bahrain's state television hours after sectarian clashes between Sunnis and the majority Shiites who are leading protests in the strategic Gulf nation. (AP Photo/Hasan Jamali)

Tens of thousands of Bahraini anti-government protesters march Friday, March 4, 2011, from the main government house in the capital of Manama, Bahrain, to the Pearl roundabout, where they have set up camp. Also on Friday, thousands of anti-government demonstrators streamed toward headquarters of Bahrain's state television hours after sectarian clashes between Sunnis and the majority Shiites who are leading protests in the strategic Gulf nation. (AP Photo/Hasan Jamali)

Women among the tens of thousands of Bahraini anti-government protesters wave flags as they march Friday, March 4, 2011, from the main government house in the capital of Manama, Bahrain, to the Pearl roundabout. Their signs read 'Down with the government.' Also on Friday, thousands of anti-government demonstrators streamed toward headquarters of Bahrain's state television hours after sectarian clashes between Sunnis and the majority Shiites who are leading protests in the strategic Gulf nation. (AP Photo/Hasan Jamali)

Tens of thousands of Bahraini anti-government protesters march Friday, March 4, 2011, from the main government house in the capital of Manama, Bahrain, to the Pearl roundabout, where they have set up camp. The signs reading 'Down Khalifa' refer to Prime Minister Khalifa Al Khalifa. Also on Friday, thousands of anti-government demonstrators streamed toward headquarters of Bahrain's state television hours after sectarian clashes between Sunnis and the majority Shiites who are leading protests in the strategic Gulf nation. (AP Photo/Hasan Jamali)

A row of riot police stand between two groups of Bahraini youths in the early hours of Friday, March 4, 2011, in Hamad Town, Bahrain, west of the capital of Manama. The Shiite opposition groups in Bahrain said Thursday they are ready to negotiate with the Gulf nation's ruling monarchy about political change after weeks of protests. (AP Photo/Hasan Jamali)

Riot police and an ambulance are seen in the early hours of Friday, March 4, 2011, in Hamad Town, Bahrain, southwest of the capital of Manama. The Shiite opposition groups in Bahrain said Thursday they are ready to negotiate with the Gulf nation's ruling monarchy about political change after weeks of protests. (AP Photo/Hasan Jamali)

Riot police gather in the early hours of Friday, March 4, 2011, in Hamad Town, Bahrain, southwest of the capital of Manama. The Shiite opposition groups in Bahrain said Thursday they are ready to negotiate with the Gulf nation's ruling monarchy about political change after weeks of protests. (AP Photo/Hasan Jamali)

A shoe is seen next to a riot-police car after a fight broke out between nationalised Sunni and Shi'ites in Hamad Town, south of Manama March 3, 2011. Sunni and Shi'ite Muslims clashed on Thursday, the first direct confrontation between the two sides since large scale protests erupted in the kingdom's main city two weeks ago. Residents said a group of Shi'ites fought with a group of Sunnis and what they said were Bahrainis of Syrian extraction. Reuters/Hamad I Mohammed

A man holds a sword used during a fight between nationalised Sunni and Shi'ites in Hamad Town, south of Manama March 3, 2011. Sunni and Shi'ite Muslims clashed on Thursday, the first direct confrontation between the two sides since large scale protests erupted in the kingdom's main city two weeks ago. Residents said a group of Shi'ites fought with a group of Sunnis and what they said were Bahrainis of Syrian extraction. Reuters/Hamad I Mohammed

A cross of ash is seen marked on the forehead of a Christian Maronite after attending a traditional Ash Monday service in Beirut March 7, 2011. Mondaymarked the first day of the 40-day period of the Christian season of Lent in Lebanon. Reuters/ Cynthia Karam

Lebanese hold national flags and banners as they protest against the sectarian makeup of Lebanon's government in Beirut, Lebanon, Sunday, March 6, 2011.According to Lebanon's power-sharing system, the president must be a Maronite Christian, the prime minister a Sunni Muslim and the parliament speaker a Shiite Muslim. Protesters called for a secular government. The banners in Arabic in the front line read:' the people want to drop the sectarian system,' and 'for a secular democratic state.' (AP Photo/Bilal Hussein)

Lebanese shout slogans as they protest against the sectarian makeup of Lebanon's government in Beirut, Lebanon, Sunday, March 6, 2011. According to Lebanon'spower-sharing system, the president must be a Maronite Christian, the prime minister a Sunni Muslim and the parliament speaker a Shiite Muslim. Protesters called for a secular government. The Arabic is a translation of what's written on banner. (AP Photo/Bilal Hussein)

The Arab Revolution of 2011