A protester performs the symbolic death of a student demonstrator during a march near Congress where Chile's President Michelle Bachelet gives her annual address in Valparaiso, Chile, Thursday, May 21, 2015. Demonstrators are protesting the death of two students killed during an education reform march last week in Valparaiso and demanding more involvement in education reform. (Photo by Luis Hidalgo/AP Photo)

Masked protesters run from police near Congress where Chile's President Michelle Bachelet gives her annual address, in Valparaiso, Chile, Thursday, May 21, 2015. (Photo by Luis Hidalgo/AP Photo)

Demonstrators are hit by jets of water released by riot police vehicles during a rally, as Chile's President Michelle Bachelet delivers a speech inside the National Congress, in Valparaiso city, May 21, 2015. (Photo by Carlos Vera/Reuters)

Demonstrators lie on the floor pretending to be dead, in reference to a student shot dead on May 14 after a protest march, during a rally, as Chile's President Michelle Bachelet delivers a speech inside the National Congress, in Valparaiso city, May 21, 2015. (Photo by Ivan Alvarado/Reuters)

Protestors are sprayed with a water cannon by police near Congress where Chile's President Michelle Bachelet gives her annual address in Valparaiso, Chile, Thursday, May 21, 2015. Demonstrators are demanding more involvement in education reform and protesting the death of two students killed during an education reform march last week in Valparaiso. (Photo by Luis Hidalgo/AP Photo)

A demonstrator lies on the floor pretending to be dead, in reference to a student shot dead on May 14 after a protest march, during a rally, as Chile's President Michelle Bachelet delivers a speech inside the National Congress, in Valparaiso city, May 21, 2015. (Photo by Ivan Alvarado/Reuters)

A masked protester aims a stone at a cordon of police, near Congress where Chile's President Michelle Bachelet gives her annual address, in Valparaiso, Chile, Thursday, May 21, 2015. (Photo by Luis Hidalgo/AP Photo)

A demonstrator lies on the floor pretending to be dead, in reference to a student shot dead on May 14 after a protest march, during a rally, as Chile's President Michelle Bachelet delivers a speech inside the National Congress, in Valparaiso city, May 21, 2015. (Photo by Ivan Alvarado/Reuters)

Demonstrators lie on the floor pretending to be dead, in reference to a student shot dead on May 14 after a protest march, during a rally, as Chile's President Michelle Bachelet delivers a speech inside the National Congress, in Valparaiso city, May 21, 2015. (Photo by Ivan Alvarado/Reuters)

A masked protester aims a stone at police, near Congress where Chile's President Michelle Bachelet gives her annual address, in Valparaiso, Chile, Thursday, May 21, 2015. Police in Chile are launching water cannons and tear gas to repel protesters trying to get past a barrier as President Michelle Bachelet speaks to the nation. Demonstrators are demanding more involvement in education reform and protesting the death of two students killed during an education reform march last week in Valparaiso. Most of the several thousand people demonstrated peacefully, but some masked protesters set barricades ablaze in the street and some vandalized nearby businesses. (Photo by Luis Hidalgo/AP Photo)

A demonstrator sprays an outline around another protester pretending to be dead, in reference to a student shot dead on May 14 after a protest march, during a rally, as Chile's President Michelle Bachelet delivers a speech inside the National Congress, in Valparaiso city, May 21, 2015. (Photo by Ivan Alvarado/Reuters)

A man holding a camera is detained during a rally, as Chile's President Michelle Bachelet delivers a speech inside the National Congress, in Valparaiso city, May 21, 2015. (Photo by Dario Alvarado/Reuters)

A demonstrator lies on the floor pretending to be dead, in reference to a student shot dead on May 14 after a protest march, during a rally, as Chile's President Michelle Bachelet delivers a speech inside the National Congress, in Valparaiso city, May 21, 2015. (Photo by Ivan Alvarado/Reuters)

A demonstrator pretending to be dead in reference to a student shot dead on May 14 after a protest march, is dragged by other protesters during a rally, as Chile's President Michelle Bachelet delivers a speech inside the National Congress, in Valparaiso city, May 21, 2015. (Photo by Ivan Alvarado/Reuters)

A demonstrator is detained by riot policemen during a rally, as Chile's President Michelle Bachelet delivers a speech inside the National Congress, in Valparaiso city, May 21, 2015. (Photo by Carlos Vera/Reuters)