Securing Chains Marine Corps Lance Cpl. Caitlin McCoy secures chains to an M777 howitzer during integrated slingload training at Marine Corps Base Camp Pendleton, Calif., April 12, 2017. McCoy is a landing support specialist assigned to Combat Logistics Battalion 15, 15th Marine Expeditionary Unit. Marine Corps photo by Cpl. Frank Cordoba SHARE IMAGE: Download Image: Full Size (1.79 MB) Tags: slingload training, training, MARINE CORPS, MARINES Photo By: Cpl. Frank Cordoba VIRIN: 170412-M-DJ953-0107A.JPG Photo Gallery