A grim President Bush and Prime Minister Tony Blair pledged defiantly Thursday to continue the fight to combat terror and stabilize Iraq, only hours after two coordinated truck-bomb attacks on British targets in Istanbul. The blasts hit the British Consulate and the offices of the London-based bank HSBC, casting a long shadow on a day when London itself was on continued high security alert, as Mr. Bush’s heavily armored limousine moved eerily through barricaded, largely deserted streets lined with police officers. Full Story