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.

An Aymara indigenous witch doctor sprays wine over offerings to Pachamama, or Mother Earth, in La Cumbre, 19 miles outside of La Paz, Bolivia on Aug. 1, 2012.

An Aymara indigenous witch doctor sprays beer over a man while making offerings to Pachamama, or Mother Earth in La Cumbre, Bolivia on Aug. 1.

People prepare to give offerings to Pachamama, or Mother Earth, in La Cumbre, Bolivia on Aug, 1.

Police officers on strike vandalize the police intelligence headquarters and burn documents in La Paz, on June 22, during a police strike demanding a 70 percent salary increase. At least three people were injured when striking Bolivian police officers clashed with an anti-riot brigade in downtown La Paz Thursday, local media reported.

Police officers on strike stand a protest in front of the Palacio Quemado presidential house in La Paz, on June 22, during a police strike demanding a 70 percent salary increase. At least three people were injured when striking Bolivian police officers clashed with an anti-riot brigade in downtown La Paz Thursday, local media reported.

Police officers on strike vandalize the police intelligence headquarters and burn documents in La Paz, on June 22, during a police strike demanding a 70 percent salary increase. At least three people were injured when striking Bolivian police officers clashed with an anti-riot brigade in downtown La Paz Thursday, local media reported.

Police officers on strike vandalize the police intelligence headquarters and burn documents in La Paz, on June 22, during a police strike demanding a 70 percent salary increase. At least three people were injured when striking Bolivian police officers clashed with an anti-riot brigade in downtown La Paz Thursday, local media reported.

Police demanding salary increases shout slogans on the roof of a police internal affairs building that was sacked and its content burned, in La Paz, Bolivia, on June 22. Protesters were demanding salaries on par with soldiers and a pension equal to 100 percent of their salaries. Bolivian police earn about $144 a month and were not appeased by a 7 percent government-decreed wage increase this year.

An official police photo burns atop a bonfire of burning documents and computers outside a police internal affairs building, in La Paz, Bolivia, on June 22. Protesting police officers sacked the offices, setting its contents on fire, demanding salaries on par with soldiers and a pension equal to 100 percent of their salaries. Bolivian police earn about $144 a month and were not appeased by a 7 percent government-decreed wage increase this year.

Medical students run from tear gas fired by police as they protest in solidarity with striking public doctors in La Paz, Bolivia on April 24. Public doctors are on their 28th day of an indefinite national strike in response to a decree by President Evo Morales that extends professional working hours from six to eight hours per day.

A miner shouts slogans against the government of Bolivia's President Evo Morales during a protest in La Paz, Bolivia on April 11. The protest was called by the Bolivian Workers Central (COB) union to demand wage increases.

An overhead view of workers marching during a protest against the government of Bolivia's President Evo Morales in La Paz, Bolivia on April 11.

A miner and member of the Bolivian Workers Union (COB) covers his head as a dynamite stick explodes during a demonstration on April 11 in La Paz, Bolivia.

Physically disabled people clash with riot police in La Paz, Bolivia on Feb. 23, 2012. Hundreds of physically disabled people arrived in La Paz on Thursday after completing a protest march of 994 miles to demand that Bolivia's government offer support in the form of $434 payment to each physically disabled Bolivian, according to local media.

A physically disabled man tries to block a police vehicle during clashes with riot police in the center of La Paz on Thursday.

A wheelchair-bound woman is helped after being affected by tear gas during clashes with riot police.