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US has 'obligation' to help Iraq, says former UK army head

19 June 2014 Last updated at 11:40 BST

The US has an "obligation" to intervene militarily in Iraq, according to the former head of the British Army.

Lord Dannatt told BBC Radio 5 live's Breakfast that Sunni-led militant group ISIS may not "be stopped" without US assistance, as their air power was needed to "stabilise the situation".

The White House is still considering a request from the Iraq's Prime Minister, Nouri al-Maliki, for air-strikes against the extremists, who have gained control of large swathes of northern Iraq.

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