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Associated Press
In this photo from June 6, 2014, train operators remove their belongings from a Union Pacific locomotive at a rail yard in Council Bluffs, Iowa. When American freight trains delivered cargo after World War II, the steam-belching beasts commonly had seven people aboard _ an engineer, a conductor, up to four brakemen and a fireman. Since then trains have grown longer, crews were reduced to two and now railroads want to put a single person in charge, an engineer.  (AP Photo/Nati Harnik)

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