Western powers at UN make case for military action against Syria

The United States, Britain and France made the case at the United Nations on Friday for military action against Syria, saying President Bashar al-Assad's repeated use of chemical weapons posed a threat to the world.US Ambassador Nikki Haley said no decision had been taken to launch strikes and stressed Washington was taking time to assess the implications of possible military action after Russia warned it could lead to a dangerous US-Russian war.