An Army crew chief instructs soldiers how to properly hook-up the cable from a container to a CH-47 Chinook helicopter during slingload operations at Bagram Airfield, Afghanistan, May 22, 2017. The soldiers are assigned to Task Force Muleskinner, and provide water, ammo, fuel, transportation, food and additional supplies to the warfighters and coalition forces in the brigade's area of operation and throughout the entire theater. Army photo by Sgt. 1st Class Shelia Cooper