June 15, 2011 in Athens, Greece

Demonstrators try to recover after police use tear gas during a protest against plans for new austerity measures June 15, 2011 in Athens, Greece. Greece's largest labor unions have called for a 24-hour strike, while the Socialist government is beginning to push through legislation for cost cutting reforms. Getty

A demonstrator shouts slogans outside Greek Parliament during a protest against plans for new austerity measures June 15, 2011 in Athens, Greece. Greece's largest labor unions have called for a 24-hour strike, while the Socialist government is beginning to push through legislation for cost cutting reforms. Getty

Police detain a protester during riots in central Athens on Wednesday, June 15, 2011. Riot police made heavy use of tear gas Wednesday to disperse groups of masked anarchists hurling firebombs and rocks on the sidelines of a major rally outside Parliament, where the struggling government was to seek support for new cutbacks required to avoid a debt default.(Petros Giannakouris)

try to recover from choking clouds of tear gas as a tent city is seen in the background in central Syntagma Square _ headquarters of a three-week-old peaceful anti-austerity movement _ during riots in central Athens on Wednesday, June 15, 2011. Riot police made heavy use of tear gas Wednesday to disperse groups of masked anarchists hurling firebombs and rocks on the sidelines of a major rally outside Parliament, where the struggling government was to seek support for new cutbacks.

Rioters and police scuffle as an officer tries to arrest a man during clashes in Athens' main Syntagma square, Wednesday, June 15, 2011. Hundreds of protesters clashed with riot police in central Athens Wednesday as a major anti-austerity rally degenerated into violence outside Parliament, where the struggling government was to seek support for new cutbacks to avoid a disastrous default. (Thanassis Stavrakis)

Demonstrators try to take cover from choking clouds of tear gas as a tent city is seen in the background in central Syntagma Square _ headquarters of a three-week-old peaceful anti-austerity movement _ during riots in central Athens on Wednesday, June 15, 2011. Riot police made heavy use of tear gas Wednesday to disperse groups of masked anarchists hurling firebombs and rocks on the sidelines of a major rally outside Parliament.

Greek riot police officers throw tear gas as they chase protesters during clashes in Athens' main Syntagma square, Wednesday, June 15, 2011. The banner reads in Greek: 'Continuous strikes, until victory'. Hundreds of protesters clashed with riot police in central Athens Wednesday as a major anti-austerity rally degenerated into violence outside Parliament, where the struggling government was to seek support for new cutbacks to avoid a disastrous default. (Lefteris Pitarakis)

Demonstrators gather in front of the Parliament in Athens' main Syntagma square, Wednesday, June 15, 2011. Hundreds of protesters clashed with riot police in central Athens Wednesday as a major anti-austerity rally degenerated into violence outside Parliament, where the struggling government was to seek support for new cutbacks to avoid a disastrous default.(Dimitri Messinis)

A Greek protester runs with a baton to hit a riot police officer during clashes in Athens' main Syntagma square, Wednesday, June 15, 2011. Hundreds of protesters clashed with riot police in central Athens Wednesday as a major anti-austerity rally degenerated into violence outside Parliament, where the struggling government was to seek support for new cutbacks to avoid a disastrous default. (Lefteris Pitarakis)

Demonstrators who gather in front of the Parliament in Athens' main Syntagma square point laser beams at the riot police, Wednesday, June 15, 2011. Hundreds of protesters clashed with riot police in central Athens Wednesday as a major anti-austerity rally degenerated into violence outside Parliament, where the struggling government was to seek support for new cutbacks to avoid a disastrous default.(Dimitri Messinis)

Riot police block the entrance of the Greek Parliament in central Athens, prior to a rally against plans for new austerity measures, on Wednesday, June 15, 2011. A 24-hour strike by Greece's largest labor unions is set to cripple public services Wednesday, as the Socialist government begins a legislative battle to push through last-ditch cost cutting reforms that will exceed its own term in office. The banner reads "direct democracy now." (Dimitri Messinis)

Police arrest a demonstrator trying to block the road to the Parliament during a rally against plans for new austerity measures, in central Athens, Wednesday, June 15, 2011. A 24-hour anti-austerity strike by Greece's largest labor unions crippled public services Wednesday, as the Socialist government was to begin a legislative battle to push through last-ditch cost-cutting reforms that will extend beyond its own term in office. (AP Photo)

Demonstrators stand in front of Greek Parliament during a protest against plans for new austerity measures June 15, 2011 in Athens, Greece. Greece's largest labor unions have called for a 24-hour strike, while the Socialist government is beginning to push through legislation for cost cutting reforms. Getty

Demonstrators confront riot police guarding the Greek parliament in Athens, June 15, 2011. Tens of thousands of grassroot activists and unionists converged on Athens' central Syntagma (Constitution) Square Wednesday as Prime Minister George Papandreou prepared to push through a new five-year campaign of tax hikes, spending cuts and selloffs of state property to continue receiving aid from the European Union and International Monetary Fund and avoid default. Reuters