Lance Cpl. Christopher Sevier, a combat engineer with

Lance Cpl. Christopher Sevier, a combat engineer with the 11th Marine Expeditionary Unit, places concertina wire around a command operations center during the build-up of a shore-based expeditionary command post as part of MEU Exercise aboard Camp Pendleton, California, April 28, 2016. The exercise ensures each element of the MEU is able to communicate, coordinate, and control all organic units, with each element demonstrating its ability to do so from an expeditionary shore site. (U.S. Marine Corps photo by Cpl. Xzavior T. McNeal/Released)