Syrian artillery pounded rebel-held areas of Homs on Monday as President Bashar al-Assad's government announced that voters had overwhelmingly approved a new constitution in a referendum derided as a sham by his critics at home and abroad. The outside world has proved powerless to halt the killing in Syria, where repression of initially peaceful protests has spawned an armed insurrection by army deserters and others. However, the Syrian Arab Red Crescent entered the besieged Baba Amro district...