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Big Boy underway near Marsh Station Road, Cochise County Arizona.
Medallion on the last car of Union Pacific's Big Boy Tour.
Steam locomotive enthusiasts photograph Big Boy while stopped in Willcox Arizona.
Union Pacific's Big Boy steam locomotive stopped in Willcox, Arizona.
Black and white image of the front of Union Pacific's Big Boy locomotive in Willcox, Arizona.
Union Pacific's Big Boy No. 4014 leaving Benson, Arizona.
Union Pacific's Big Boy No. 4014 steam locomotive approaching Benson, Arizona. Big Boy is the largest steam locomotive in the world and the last one running.
Last railcar of Union Pacific's Big Boy Tour in Cochise County Arizona.
Black and white image of Big Boy in the Arizona countryside.
Big Boy No. 4014 barreling through Cochise County, Arizona USA.
Black and white photo of the largest steam locomotive in the world and the last one still running.
Union Pacific's Big Boy steaming through Cochise County Arizona.
Union Pacific's Big Boy No. 4014 near Benson, Arizona.
Going away view of Big Boy No. 4014 leaving Rillito, Arizona.
Union Pacific's Big Boy No. 4014 near Marana, Arizona.
Freight train at dusk in Southern Arizona near Vail.
Close view of a locomotive with the engineer in the window.
Wheels and body of a well-worm rail car.
Motion blur of a Union Pacific locomotive shot along I-10 between Phoenix and Tucson, Arizona.
