U.S. Army Staff Sgt. Enrique Talavera, 757th Expeditionary Rail Command railway planning and advisory team member, takes a break after hammering a spike into rail tracks as his teammates dig out rotted rail ties at Joint Base Langley-Eustis, Va., Oct. 4, 2016. Talavera and his team are re-classing from their specific rail duties into a specialty that oversees all rail operations. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

A 757th Expeditionary Rail Command U.S. Army Soldier hammers spikes onto a railway during a railway advisory and planning training course at Joint Base Langley-Eustis, Va., Oct. 4, 2016. Soldiers took the course due to being re-classed into a single rail advisory and planning specialty. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

U.S. Army Soldiers with the 757th Expeditionary Rail Command conduct rail maintenance during field training for the railway planning and advisory course at Joint Base Langley-Eustis, Va., Oct. 4, 2016. The students took the class as part of a re-classing within the Army rail career field. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

U.S. Army Staff Sgt. Miguel Berea, 757th Expeditionary Rail Command railway planning and advisory team member, nudges a rail tie into place during a training course at Joint Base Langley-Eustis, Va., Oct. 4, 2016. After completing the course the team will be able to advise on a variety of global rail operations. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

U.S. Army Spc. Mclenzy Bristow, 757th Expeditionary Rail Command railway planning and advisory team member, measures the distance between rail ties during a training course at Joint Base Langley-Eustis, Va., Oct. 4, 2016. Railway planning and advising are part of a new rail field, which was consolidated from three previous railroad specialties in 2015. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

U.S. Army Spc. Riley Stonemenger, 757th Expeditionary Rail Command railway planning and advisory team member, uses a pick to loosen rotted rail ties during a training course at Joint Base Langley-Eustis, Va., Oct. 4, 2016. Rail advisory missions can range from advising military units on transporting equipment for the U.S. Air Force, humanitarian supplies for the Army, fuel for the U.S. Marines and a variety of other supplies or equipment for any interested military party. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)