Iraq's Kurdish minority have expanded their territorial control this month thanks to the collapse of the Iraqi army in the country's north. Kurdish leaders are unlikely to give it back.
John Kerry said the Sunni Arab uprising in Iraq posed an 'existential' threat to the country today. But what the US can or should do about it is something else again.
A backgrounder on an extremist organization that is one of the Sunni Arab factions fighting and winning ground against the central government in Iraq.