From the Guardian: "It was the deadliest single incident in the Iraqi capital for six months, but there was nothing unique about the explosion; it took place a few hundred metres from Haifa Street, a well-known centre of resistance to the American occupation and the scene of heavy fighting on Sunday. It was embarrassingly close to the green zone and the US embassy. But it reveals a grim truth about the nature of Iraq's evolving insurgency: Iraqis are killing Iraqis."