Protesters shout slogans during a protest called by the Worker's United Center (CUT, by its Spanish acronym), The School of Teachers, and social organizations, in Valparaiso, Chile, on May 21, 2013. The protest was performed simultaneously with the delivery of the last management report by president Sebastian Pinera before Chile's National Congress. (Xinhua/Jorge Villegas)

Protesters run to avoid water squirted by police during a protest called by the Worker's United Center (CUT, by its Spanish acronym), The School of Teachers, and social organizations, in Valparaiso, Chile, on May 21, 2013. The protest was performed simultaneously with the delivery of the last management report by president Sebastian Pinera before Chile's National Congress. (Xinhua/Jorge Villegas)

A group of people participates in a protest called by the Worker's United Center (CUT, by its Spanish acronym), The School of Teachers, and social organizations, in Valparaiso, Chile, on May 21, 2013. The protest was performed simultaneously with the delivery of the last management report by president Sebastian Pinera before Chile's National Congress. (Xinhua/Jorge Villegas)

A protester holds a banner during a protest called by the Worker's United Center (CUT, by its Spanish acronym), The School of Teachers, and social organizations, in Valparaiso, Chile, on May 21, 2013. The protest was performed simultaneously with the delivery of the last management report by president Sebastian Pinera before Chile's National Congress. (Xinhua/Jorge Villegas)