Iraq crisis: How Saudi Arabia helped Isis take over the north of the country

How far is Saudi Arabia complicit in the Isis takeover of much of northern Iraq, and is it stoking an escalating Sunni-Shia conflict across the Islamic world? Some time before 9/11, Prince Bandar bin Sultan, once the powerful Saudi ambassador in Washington and head of Saudi intelligence until a few months ago, had a revealing and ominous conversation with the head of the British...