Straw's leaked letter to Blair on Iraq

"A legal justification is a necessary but far from sufficient pre-condition for military action. We have also to answer the big question – what will this action achieve? There seems to be a larger hole in this than on anything. Most of the assessments from the US have assumed regime change as a means of eliminating Iraq's WMD threat. But none has satisfactorily answered how that regime change is to be secured, and how there can be any certainty that the replacement regime will be better."