Two Soldiers from Company E, 2nd Battalion, 4th Aviation Regiment, Combat Aviation Brigade, 4th Infantry Division, Multi-National Division - Baghdad, refuel an Apache attack helicopter during an Extended Range Fuel System II training exercise at Camp Taji, Nov. 10. The ERFS is a system integrated into a Chinook helicopter, or "Fat Cow," that provides increased mission flexibility by providing a highly mobile forward area fuel source. This integrated system makes it possible to set-up a fuel point anywhere the Chinook can land.