Add Yahoo as a preferred source to see more of our stories on Google. The world's largest steam locomotive is back on the rails to celebrate America's 250th anniversary. Union Pacific Railroad said ...

A dinosaur rolled into Kansas City Tuesday night. It’s not really a dinosaur, but the Union Pacific No. 4014 Big Boy steam locomotive that rumbled and hissed to a stop at Union Station to the delight ...

No railroad was better equipped to shoulder the heavy burden of wartime traffic thanks to the three types of Union Pacific steam locomotives that constituted its front line of defense: the 4-6-6-4 ...