Iraq war could cost US $6tn

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The US war in Iraq has cost $1.7 trillion (£1.1tn) with an extra $490 billion in benefits owed to war veterans, expenses that could grow to more than $6tn (£4tn) over the next four decades with interest, a new study has found.

The war killed at least 134,000 Iraqi civilians and may have led to the deaths of four times that number, said the Costs of War Project by the Watson Institute for International Studies at Brown University, ahead of the tenth anniversary of the US-led invasion on 19 March.