A CH-53E Super Stallion helicopter from Marine Medium Tiltrotor Squadron (VMM) 166 (Reinforced), 3rd Marine Aircraft Wing, prepares to lift a 6,200 pound steel girder 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. (Official Marine Corps photo by Sgt. Brian Marion/Released) - A CH-53E Super Stallion helicopter from Marine Medium Tiltrotor Squadron (VMM) 166 (Reinforced), 3rd Marine Aircraft Wing, prepares to lift a 6,200 pound steel girder 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. (Official Marine Corps photo by Sgt. Brian Marion/Released)