Violence marks anti-authoritarian protests

Anti-government protesters control Benghazi, Libya, as dissent fills the streets of Yemen, Bahrain and Morocco.

A protester is arrested in Marrakech, Morocco, during one of a string of nationwide protests that brought thousands to the streets across Morocco on Sunday, Feb. 20, 2011, in an effort to push for greater democracy and constitutional reform. Protesters in Morocco and other Arab nations may also be wary as they watch Tunisia and Egypt grapple with the challenges of building a new system and maintaining order after breaking free of autocrats. (AP Photo/Tarik Najmaoui)

A protester is arrested in Marrakech, Morocco, during one of a string of nationwide protests that brought thousands to the streets across Morocco on Sunday, Feb. 20, 2011, in an effort to push for greater democracy and constitutional reform. Protesters in Morocco and other Arab nations may also be wary as they watch Tunisia and Egypt grapple with the challenges of building a new system and maintaining order after breaking free of autocrats. (AP Photo/Tarik Najmaoui)

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