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.