CREW CHIEF U.S. Marine Corps Cpl. Ryan P. Wells provides aerial security from inside a CH-53E Super Stallion helicopter over Helmand province, Afghanistan, Oct. 7, 2013. Wells, a crew chief, is assigned to Marine Heavy Helicopter Squadron 462. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 719760-E-MBD61-798.jpg Photo Gallery