Officials of the National Emergencies Commission stand guard during a blockade towards the Turrialba Volcano, near Santa Cruz de Turrialba, 65km northeast of San Jose, capital of Costa Rica, on Oct. 30, 2014. The Turrialba Volcano presented an eruption of ashes and stones on Thursday, provoking the evacuation of residents living in the surrounding area, according to the local press. (Xinhua/Kent Gilbert)