Lance Cpl. John E. Sabia, computer and data network specialist, tapes down local-area network cables after wiring the training site with secured and non-secured internet protocol lines. The command post exercise helped the Marines of the 24th Marine Expeditionary Unit command element gain greater proficiency in coordinating and operating a forward command operations center. - Lance Cpl. John E. Sabia, computer and data network specialist, tapes down local-area network cables after wiring the training site with secured and non-secured internet protocol lines. The command post exercise helped the Marines of the 24th Marine Expeditionary Unit command element gain greater proficiency in coordinating and operating a forward command operations center.