In This March 4, 2011, file photo Tens of thousands of Bahraini 

In This March 4, 2011, file photo Tens of thousands of Bahraini anti-government protesters march from the main government house in the capital of Manama, Bahrain, to the Pearl roundabout, where they have set up camp. The sign reading "Down Khalifa" refers to Prime Minister Khalifa Al Khalifa. (AP Photo/Hasan Jamali)
Associated Press
In This March 4, 2011, file photo Tens of thousands of Bahraini anti-government protesters march from the main government house in the capital of Manama, Bahrain, to the Pearl roundabout, where they have set up camp. The sign reading "Down Khalifa" refers to Prime Minister Khalifa Al Khalifa. (AP Photo/Hasan Jamali)
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