Chile's President Sebastian Pinera (4th R) applauds during the signing of a document in Santiago, Chile, Dec. 23, 2019. Pinera on Monday enacted a law that calls for an April 26 plebiscite on whether or not Chileans want to change the Constitution. During the signing of the document, Pinera said a new Constitution can help to address many of the grievances that have sparked weeks of protests against inequality. (Xinhua)