Securing Landing Zone As seen through a night-vision device, Marine Corps Sgt. Eric Ortega provides security while waiting for a helicopter to land during an urban training exercise on Guam, Jan. 13, 2016. Ortega is an assistant communications chief assigned to Maritime Raid Force, 31st Marine Expeditionary Unit. U.S. Marine Corps Photo by Cpl. Thor J. Larson SHARE: Download: Full Size (1.48 MB) Tags: Realistic Urban Training Exercise, Maritime Raid Force, Photo Essays, Force Reconnaissance Platoon, 31st Marine Expeditionary Unit 31st MEU, All images Credit: Cpl. Thor Larson VIRIN: 160113-M-MS007-087.JPG Photo Gallery