Experts and oil officials say it will take years to recover from the damage done by ISIS.

Militants set fire to facilities at the Ain Zalah field and then withdrew, following a Thursday offensive by Kurdish forces and weeks of U.S. air strikes in the area.

A survivor of a deadly helicopter crash recounts efforts by Kurdish Peshmerga, Iraqi Army U.S. Special Forces, and Syrian YPG fighters to save civilians from ISIS militants and starvation.

Outside the zone of American air strikes, Kurdish forces are reeling as insurgents advance in Jalawla, extending their control into a key pocket of land between Kirkuk, Sulaimaniya, Baghdad and Iran.

Anti-government forces lose ground in areas of northern Iraq heavily populated by people and oil reserves.

The U.S. has made humanitarian air drops and prepared to give air support to out-gunned Peshmerga, whose recent retreats have left cities and key infrastructure exposed.

The combined efforts of the Iraqi and Kurdish governments have not rescued the thousands of civilians threatened with imminent death after the most recent ISIS offensive.

Many thousands of members of Iraq's Yezidi minority in Ninewa province are likely to die unless they can be rescued from extremist militants.