U.S. Ambassador Samantha Power has lashed into Russia at the United Nations, accusing Moscow of holding the Security Council "hostage" by blocking against Syria. Power blames the structure of the Security Council, which lets four major nations hold veto power - Russia, the United States, China, France and Britain. Russia has consistently used its veto power to block action President Bashar Assad's regime. Power says "The system has protected the prerogatives of Russia, the patron of a regime that would brazenly stage the world's largest chemical weapons attack in a quarter century, when chemical weapons inspectors sent by the United Nations were just across town." Power says Russia "Russia continues to hold the Council hostage and shirks its international responsibilities."