politics-war: A riot police officer throws a tear gas canister at students during a demonstration against the government to demand changes in the public state education system in Valparaiso city, Chile, on June 26, 2013.
politics-war: A riot police officer throws a tear gas canister at students during a demonstration against the government to demand changes in the public state education system in Valparaiso city, Chile, on June 26, 2013.
