== Heemeyer dozer - a CAT D9 or a Komatsu D335A ? == 

 == Civilian incident illustrating the D9's power == 

 Please note: Local newspapers are quite specific in identifying the Heemeyer bulldozer as a Komatsu D335A - not a Caterpillar D9. 

 On the 4th of June, 2004 a Granby, Colorado, USA resident by the name of Marvin Heemeyer ran amok driving a modified D9 and destroyed several houses and community buildings in the small farming village of Granby. He crashed the buildings of his adversaries in a zoning dispute involving his muffler shop and a new concrete mixing plant. Heemeyer fitted makeshift concrete armor to the vehicle, turning it into a tank-like mobile fortress. The cabin, engine and tracks were protected by reinforced concrete armor that was, in places, over one foot thick. The driver's vision of where he was going was provided by video cameras outside the driver's compartment feeding three CRTs inside. Heemeyer also provided food, water, and air conditioning for himself inside the fortified driver's cabin. The bulldozer was armed with several rifles and a .50 caliber (12.7 mm) gun. The D9 itself was an old model that was no longer in production. 

 During the one-and-a-half hour rampage, law enforcement officers fired hundreds of bullets at the makeshift tank and set off explosive charges against it, but could not stop the D9's rampage. Finally the fortified D9 came to rest, trapped in the rubble of a collapsed building. A failed radiator brought the vehicle to a halt. Heemeyer apparently took his own life in his cockpit, while SWAT teams were using explosives and oxy-acetylene cutting torches to gain access to the driver's compartment. 

 Although nobody else was killed in the incident, property damage was very extensive. According to many reports, Heemeyer went out of his way to avoid killing innocents, and apparently the purpose of his rampage was solely to cause extensive property damage to his 'enemies.' 

 See: killdozer (bulldozer).