First Sgt. Nathan Arbuckle, a senior enlisted

First Sgt. Nathan Arbuckle, a senior enlisted noncommissioned officer in charge with 5th Squadron, 7th Cavalry Regiment, 3rd Infantry Division, stationed at Fort Stewart, Ga., uses proper hand signals to ground guide a High Mobility Multipurpose Wheeled Vehicle, commonly known as a Humvee, onto a flatbed of a train during a railhead operation near Smardan, Romania, Dec. 3, 2015.