Copter Check Marines conduct a preflight check on a CH-53E Super Stallion during a large-scale, combined-arms training exercise at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., April 26, 2018. Marine Corps photo by Cpl. Koby I. Saunders SHARE IMAGE: Download Image: Full Size (1.62 MB) Photo By: Cpl. Koby Saunders VIRIN: 180426-M-AF202-0037C.JPG Photo Gallery