Osprey Prep Marines load gear into an MV-22B Osprey after completing a noncombatant evacuation and mass casualty drill at Joint Forces Training Base Los Alamitos, Calif., June 6, 2017. The Marines are assigned to the 15th Marine Expeditionary Unit. Marine Corps photo by Cpl. Frank Cordoba SHARE: Download: Full Size (0.5 MB) Credit: Cpl. Frank Cordoba VIRIN: 170606-M-DJ953-0209C.JPG Photo Gallery