The command center of a rail yard monitors thousands of freight trains en route to their final destinations. See how it work in this excerpt from Freight Trains.

The command center of a rail yard monitors thousands of freight trains en route to their final destinations. See how it work in this excerpt from "Freight Trains.

"Trains and what happens to them when they reach the end of the line. Included: the dismantling of trains for use as scrap; and train restoration. Also: the uses of .

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