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Caterpillar

Thursday, 23 Aug 2012 | 12:00 AM ET

How do you build a two-story mining truck that's the biggest in the world? It requires a specialized factory in Decatur, Illinois, where everything is supersized -- from the plasma cutters and weld guns to the torque tools and hand wrenches. Imagine installing a 12-foot wheel or an engine bigger than a car. From basic blue print to the completed mega truck, we'll follow the building of CAT's most colossal creation.