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Medallion on the last car of Union Pacific's Big Boy Tour.
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.
Last railcar of Union Pacific's Big Boy Tour in Cochise County Arizona.
Black and white image of Big Boy in the Arizona countryside.
