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Big Boy cruises through Cochise County Arizona.
Big Boy underway near Marsh Station Road, Cochise County Arizona.
Big Boy No. 4014, the largest steam locomotive in the world is 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.
Sign on Big Boy 4014 from American Locomotive Company Schenectady Works November 1941.
Steam escaping from Big Boy in Willcox, Arizona.
Two engineers on Union Pacific's Big Boy 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.
Big Boy 4014 barrels through Cochise County Arizona.
The only Big Boy steam locomotive still running passes between Tucson and Willcox Arizona.
Big Boy No. 4014 heading east from Tucson Arizona.
View of Big Boy No. 4014 from as is lumbers east from Tucson, Arizona.
Three quarter view of Big Boy 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.
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.
Union Pacific's Big Boy No. 4014 steams through Marana, Arizona.
