The death toll among Iraqis as a result of the US-led invasion has now reached an estimated 655,000, a study in the Lancet medical journal reports today. The figure for the number of deaths attributable to the conflict - which amounts to around 2.5% of the population - is at odds with figures cited by the US and UK governments and will cause a storm, but the Lancet says the work, from the Johns Hopkins Bloomberg School of Public Health in Baltimore, has been examined and validated by four separate independent experts who all urged publication.