Riot policemen arrest a demonstrator during a protest in Athens on December 15, 2010 against the socialist government's austerity policies. Clouds of tear gas mingled with smoke in Athens and a former minister was reportedly hurt as police and stone-throwing protesters clashed on December 15 during a demonstration against new austerity measures. Protesters set garbage bins and cars on fire outside a trio of luxury hotels on central Syntagma Square and threw projectiles at riot police during the union-backed demonstration that attracted some 20,000 participants, according to police. AFP PHOTO / Aris Messinis (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

ATHENS, GREECE - DECEMBER 15: A woman walks past riot police during clashes with protestors December 15, 2010 in Athens, Greece. Violence erupted after approximately 20, 000 protestors marched to parliament during a 24-hour general strike over labor reforms. Protestors reportedly clashed with riot police throughout Athens, buring cars and throwing gasoline bombs. (Photo by Milos Bicanski/Getty Images)

Demonstrators march in central Athens during a protest on December 15, 2010 against the socialist government's austerity policies. Clouds of tear gas mingled with smoke in Athens and a former minister was reportedly hurt as police and stone-throwing protesters clashed on December 15 during a demonstration against new austerity measures. Protesters set garbage bins and cars on fire outside a trio of luxury hotels on central Syntagma Square and threw projectiles at riot police during the union-backed demonstration that attracted some 20,000 participants, according to police. AFP PHOTO / Aris Messinis (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

GREECE,ATHENS - DECEMBER 15: A protester grabs a riot police officer during a massive labor protest against the government's austerity measures, on December 15, 2010 in Athens, Greece. The clashes erupted as approximately 20,000 protesters marched to parliament during the general strike opposed to a new round of labor reforms in the financially beleaguered country. (Photo by Milos Bicanski/Getty Images)

ATHENS, GREECE - DECEMBER 15: Police arrest an austerity protester December 15, 2010 in Athens, Greece. Violence erupted after approximately 20, 000 protestors marched to parliament during a 24-hour general strike over labor reforms. Protestors reportedly clashed with riot police throughout Athens, buring cars and throwing gasoline bombs (Photo by Milos Bicanski/Getty Images)

Demonstrators hurl runs a petrol bomb during a protest in Athens on December 15, 2010. Police fired extensive amounts of tear gas in Athens on Decembner 15 and a former minister was reportedly hurt as clashes broke out with stone-throwing protesters in a violence-marred demonstration against a new wave of austerity measures. Clouds of tear gas mingled with smoke as protesters set garbage bins and cars on fire outside a trio of luxury hotels on central Syntagma Square and threw projectiles at riot police during the union-backed demonstration that attracted some 20,000 participants, according to police. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

GREECE,ATHENS - DECEMBER 15: Hundreds of protesters clash with riot police during a massive labor protest against the government's austerity measures, on December 15, 2010 in Athens, Greece. The clashes erupted as approximately 20,000 protesters marched to parliament during the general strike opposed to a new round of labor reforms in the financially beleaguered country. (Photo by Milos Bicanski/Getty Images)

A riot police member stands in front of a fire caused by petrol bombs during a protest against new austerity measures in Athens on December 15, 2010. Police fired tear gas in Athens today and a former minister was reportedly hurt as clashes broke out with stone-throwing protesters. Protesters set garbage bins on fire outside a luxury hotel on central Syntagma Square and threw projectiles at riot police during the union-backed demonstration that attracted some 15,000 participants, according to police. Some protesters also manhandled a former minister and conservative deputy who was forced to take refuge inside a building. AFP PHOTO / Aris Messinis (Photo credit should read ARIS MESSINIS/AFP/Getty Images)