Riots in Greece

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  Demonstrators clash with police during the demonstration against the new austerity measures in Syntagma Square on February 12, 2012 in Athens, Greece. Greece's creditors have demanded further austerity measures before approving a new bailout from the European Union, European Central Bank and International Monetary Fund amid renewed concerns the country may default. VLADIMIR RYS/GETTY IMAGES

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  Demonstrators clash with police during the demonstration against the new austerity measures in Syntagma Square on February 12, 2012 in Athens, Greece. Greece's creditors have demanded further austerity measures before approving a new bailout from the European Union, European Central Bank and International Monetary Fund amid renewed concerns the country may default. VLADIMIR RYS/GETTY IMAGES

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  Riot police clash with a protester in Athens, Friday, Feb. 10, 2012. Thousands took to the streets of Athens as unions launched a two-day general strike against planned austerity measures on Friday, a day after Greece's crucial international bailout was put in limbo by its partners in the 17-nation eurozone. (AP Photo/Thanassis Stavrakis) Thanassis Stavrakis / AP

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  A protester throws a petrol bomb toward riot police during clashes in Athens, Friday, Feb. 10, 2012. Thousands took to the streets of Athens as unions launched a two-day general strike against planned austerity measures on Friday, a day after Greece's crucial international bailout was put in limbo by its partners in the 17-nation eurozone. (AP Photo/Petros Giannakouris) Petros Giannakouris / AP

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  Riot police clash with demonstrators during a protest in Athens on Friday, Feb. 10, 2012. Thousands took to the streets of Athens as unions launched a two-day general strike against planned austerity measures a day after Greece's crucial international bailout was put in limbo by its partners in the 17-nation eurozone. Clashes broke out in Syntagma Square, outside Parliament, as dozens of hooded youths threw fire bombs and stones at police, who responded with tear gas. (AP Photo/Dimitri Messinis) Dimitri Messinis / AP

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  A riot policeman tries to avoid a stone thrown by a protester during clashes in Athens, Friday, Feb. 10, 2012. Thousands took to the streets of Athens as unions launched a two-day general strike against planned austerity measures on Friday, a day after Greece's crucial international bailout was put in limbo by its partners in the 17-nation eurozone. (AP Photo/Petros Giannakouris) Petros Giannakouris / AP