An independent mine worker participates in a protest rally in La Paz, Sept. 18, 2012.

An independent mine worker throws a dynamite stick during clashes with unionized mine workers in La Paz, Sept. 18.

Independent miners attend a protest rally in La Paz September 18, 2012. Thousands of independent mine workers of Bolivia's recently nationalized Colquiri tin mine protested against unionized mine workers and the government of Bolivian President Evo Morales.

A riot police officer helps state-employed miners carry a co-worker after he was wounded in a dynamite explosion during clashes with miners from private cooperatives, as the latter marched through the streets of La Paz, Sept. 18.

Firefighters and policemen help a wounded person during a miners' protest in front of Federacion Nacional de Mineros' headquarters in La Paz, Bolivia, Sept. 18.

Protesters are seen in front of smoke after burning a police booth in front of the Interior Ministry in Cairo on Wednesday, June 29. Police in central Cairo fired tear gas on Wednesday at hundreds of mainly young stone-throwing Egyptians demanding that trials of former senior officials from the discredited Mubarak era proceed faster. Clashes broke out late on Tuesday in an area of the capital where some families of the more than 840 people killed in the uprising that led to President Hosni Mubarak's overthrow in February held an event to honor those dead.

A protester takes cover during clashes with riot police in front of the Interior Ministry in Cairo.

Egyptian protesters use a liberated riot police gear for protection during clashes with security forces, unseen at Tahrir Square in Cairo on Wednesday.

A protester runs away from tear gas in Tahrir Square in Cairo on Wednesday.

A protester wearing a gas mask walks beside a burning van during violent protests against austerity measures in Athens onTuesday, June 28. With Greece teetering on the brink of bankruptcy, parliament is due to vote this week on a package of spending cuts, tax increases and privatisations agreed as part of a massive bailout aimed at averting the euro zone's first default.

A protestor throws a broken piece of furniture to riot police during clashes at central Athens Syntagma square by the Greek Parliament on Tuesday. Workers staged a 48-hour general strike against the bankruptcy-threatened government which is desperately trying to push through sweeping austerity cuts. As parliament votes on the drastic belt-tightening measures to unlock 12 billion euros ($17 billion) of blocked funds from the EU and IMF, unions have called on Greeks facing hefty tax hikes to stage mass demonstrations.

A demonstrator jumps to attempt to break a window displaying an image of an ancient greek galley during protests against austerity measures in Athens on Tuesday.

Indian women run for cover as a police vehicle was set ablaze by the Krishak Mukti Sangram Samiti (KMSS) protesters in Guwahati city, northeast India on June 22 2011. The demonstrators were protesting against the mass eviction of unauthorized occupants from government forest lands in and around Guwahati city. The demonstrators set ablaze several vehicles including city buses and pelted stones on number of passing vehicles. According to reports, one girl died in police firing and several others were injured.

A Krishak Mukti Sangram Samiti (KMSS) protester is seen breaking a bus after set it on fire in Guwahati city, northeast India, on June 22. The demonstrators were protesting against the mass eviction of unauthorized occupants from government forest lands in and around Guwahati city. The demonstrators set ablaze several vehicles including city buses and pelted stones on number of passing vehicles.

Police clash with protesters outside the Topshop store in central London, during a mass demonstration against government financial cuts on Saturday, March 26. Tens of thousands marched through London today in a demonstration against the government's austerity measures, amid a heavy police presence that failed to stop outbreaks of violence.

Demonstrators break windows of the Ritz Hotel, during a protest organized by the Trades Union Congress, called 'The March for the Alternative,' in central London on March 26.

Egyptian Coptic Christians grieve over the coffins during a mass funeral for seven victims of sectarian clashes, at Samaan el-Kharaz Church in Manshiet Nasr shantytown in eastern Cairo on Thursday, March 10.

Egyptian Coptic Christian women grieve after a mass funeral for seven victims of sectarian clashes, at Samaan el-Kharaz Church in Manshiet Nasr shantytown in eastern Cairo on Thursday.

Egyptian Coptic Christians gather during the mass funeral of people killed in bloody clashes between Christians and Muslims two days earlier, at the Samaan el-Kharaz Church in Cairo on March 10.

Egyptian Coptic Christians look through a fence during a mass funeral for seven victims of sectarian clashes, at Samaan el-Kharaz Church in Manshiet Nasr shantytown in eastern Cairo on March 10.