Marines with Combat Logistics Battalion 13 attach a 6,200 pound steel girder to a CH-53E Super Stallion helicopter from Marine Medium Tiltrotor Squadron 166, 3rd Marine Aircraft Wing, during external lift training aboard Marine Corps Air Station Miramar, Calif., Oct. 14. The squadron conducted the training to maintain proficiency in transporting external cargo. - Marines with Combat Logistics Battalion 13 attach a 6,200 pound steel girder to a CH-53E Super Stallion helicopter from Marine Medium Tiltrotor Squadron 166, 3rd Marine Aircraft Wing, during external lift training aboard Marine Corps Air Station Miramar, Calif., Oct. 14. The squadron conducted the training to maintain proficiency in transporting external cargo.