US troops fighting losing battle for Sunni triangle
The mob grew more frenzied as the gunmen dragged the two surviving Americans from the cab of their bullet-ridden lorry and forced them to kneel on the street.
Killing one of the men with a rifle round fired into the back of his head, they doused the other with petrol and set him alight. Barefoot children, yelping in delight, piled straw on to the screaming man's body to stoke the flames.
Within minutes, four American contractors, all employees of the Halliburton subsidiary Kellog, Brown & Root, were dead. The jubilant crowd dragged their corpses through the street, chanting anti-US slogans.
Perhaps fearful of public reaction in America, where support for the war is falling, US officials suppressed details of the Sept 20 attack, which bore a striking resemblance to the murder of four other contractors in Fallujah last year.