U.S. Army Staff Sgt. Christopher Davis, first mate, 97th Transportation Company, 10th Transportation Battalion, 7th Transportation Brigade (Expeditionary), delivers a safety briefing before a training exercise on Fort Eustis' 3rd Port at Joint Base Langley-Eustis, Va., Feb. 1, 2018. Members of the 149th Seaport Operations Company executed a roll-on, roll-off exercise where vehicles were loaded and unloaded onto a vessel. (U.S. Air Force photo by Airman 1st Class Monica Roybal)