A U.S. Army CH-47 Chinook helicopter assigned to the 10th Combat Aviation Brigade and operated by Soldiers with Texas and Oklahoma Army National Guard units hovers over a shipping container to be sling-loaded to the aircraft during a personnel and equipment movement mission at Forward Operating Base Airborne in Wardak province, Afghanistan, Oct. 26, 2013. The CH-47s played a critical role in retrograde operations and base closures across eastern Afghanistan.