Photobomb: Improving the nation's railroads

Two Amtrak lineman assess overhead wires at the Holden Interlocking in Attleboro, Massachusetts. (Credit: Christina Burton, 2013)

A team of Amtrak signalmen, helpers, and track maintenance associates stand together for a group photo at the Sunnyside Railyard in Queens, New York. (Credit: Christina Burton, 2013)

A track welder takes a downswing on newly laid rail in an Arizona upgrade project. (Credit: Christina Burton, 2013)

In Arizona, a track supervisor surveys a grade crossing as a ballast regulator waits behind him until its next move over the rail. (Credit: Christina Burton, 2013)

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