Spc. Pablo Gonzalez, a petroleum supply specialist (left), Sgt. Billy Taylor a motor transport operator (center) and Staff Sgt. Eric Barnett, also a petroleum supply specialist, all assigned to Company A, 115th "Muleskinner" Brigade Support Battalion, 1st "Ironhorse" Brigade Combat Team, 1st Cavalry Division, watch the positioning of a CH-47 Chinook helicopter prior to attaching a water blivet and cargo net while conducting sling load training during the Brigade Support Area exercise June 1, at Fort Hood, Texas. Sling load operations allow expedient drop-off and pick-up of supplies during combat or training.