A car bomb exploded near a US convoy in Baghdad wounding six people, including an American soldier, as a senior Sunni cleric threatened a holy war against US forces in Iraq unless they leave. Several Philippine troops left the country in a move calculated to save the life of a hostage, but there was a grim prognosis on the fate of a Bulgarian hostage. And, underscoring the tenacity of a rebellion that Prime Minister Iyad Allawi has vowed to crush, two policeman were shot dead, one in Baghdad, the other in the northern city of Kirkuk, as insurgents fired mortar rounds at an already damaged oil pipeline in the north but missed. The car bomb, at least the third in as many days, was driven into the rear of the military convoy at about 1:00 pm (0900 GMT) before detonating, the army said. Full Story