An anti-government demonstrator throws a teargas canister after it was thrown at protesters by the police, during clashes at Altamira square in Caracas February 27, 2014. Venezuelans began a week-long national holiday on Thursday as some protests still simmered but President Nicolas Maduro's government was hoping the break will take the heat out of the nation's worst unrest for a decade. REUTERS/Tomas Bravo (VENEZUELA - Tags: POLITICS CIVIL UNREST)