FILE- In this July 20, 2017, file photo, a Union Pacific employee is seen on board a locomotive in a rail yard in Council Bluffs, Iowa.
FILE- In this July 20, 2017, file photo, a Union Pacific employee is seen on board a locomotive in a rail yard in Council Bluffs, Iowa. Nati Harnik, File AP Photo
FILE- In this July 20, 2017, file photo, a Union Pacific employee is seen on board a locomotive in a rail yard in Council Bluffs, Iowa. Nati Harnik, File AP Photo