Clashes have erupted in the Chilean capital of Santiago ahead of Tuesday’s 39th anniversary of the U.S.-backed overthrow of President Salvador Allende. On September 11, 1973, Allende died in the presidential palace in the coup that brought Augusto Pinochet to power. On Sunday, Chilean police fired tear gas while protesters commemorating Pinochet’s victims set up barricades and threw Molotov cocktails.