Marines in flack vest from Alpha Company, 1ST Battalion, 23rd Marines, Houston, Texas, charge out the rear of a CH-53D Sea Stallion helicopter during training at Camp Pendleton, California, as part of Exercise KERNEL BLITZ '97. Marine in background is armed with M240G 7.62mm medium machine gun. KERNEL BLITZ is taking place off the coast of Southern California and Camp Pendleton to train Navy and Marine Corps personnel in amphibious operations