The Union Pacific Big Boy 4014 isn't just another train - it's the largest operating steam locomotive in the world, originally built in 1941 to haul heavy freight across mountain ranges. Weighing over a million pounds and stretching more than 130 feet long, it was designed purely for power... and even today, it still moves exactly like that. This footage comes from a public run in Marysville, where hundreds of people gathered just to watch it pass. As the locomotive moves, thick black smoke pour
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The Union Pacific Big Boy 4014 isn't just another train - it's the largest operating steam locomotive in the world, originally built in 1941 to haul heavy freight across mountain ranges. Weighing over a million pounds and stretching more than 130 feet long, it was designed purely for power... and even today, it still moves exactly like that. This footage comes from a public run in Marysville, where hundreds of people gathered just to watch it pass. As the locomotive moves, thick black smoke pour
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