It sure is an ugly duckling but we’re impressed with it’s performance. The air tank is an old spent fire extinguisher. The stock valve was removed and the insides were cleaned out. Out of ...

On June 4, 2004, Marvin Heemeyer, a welder and former Air Force serviceman, unleashed chaos on Granby, Colorado, with a DIY tank. His creation—a heavily armored, modified Komatsu bulldozer ...