180726-N-VO150-853 VIRGINIA BEACH, Va. An U.S. Army Heavy Expanded Mobility Tactical Truck drives down the ramp of the Military Sealift Command dry cargo-carrying surge sealift ship USNS Eugene A. Obregon (T-AK 3006) onto the roll on/roll off discharge facility (RRDF) platform during the Trident Sun 18 exercise. Trident Sun 18 is a maritime prepositioning force (MPF) operation intended to provide training to reserve component personnel with regards to the in stream offload of military vehicles and equipment. (U.S. Navy photo by Mass Communication Specialist 2nd Class Kenneth Gardner/Released)