You can't make this stuff up.
Marvin John Heemeyer (October 28, 1951 – June 4, 2004) was a skilled American welder and owner of an automobile muffler repair shop. On June 4, 2004, frustrated over a failed zoning dispute, Heemeyer used a Komatsu D355A bulldozer modified with armor in the forms of steel and concrete to demolish the town hall, a former judge's home and other buildings in Granby, ColoradoWikiThe piece of construction equipment used in the incident was a Komatsu D335A bulldozer fitted with makeshift armor plating covering the cabin, engine and parts of the tracks. In places, the vehicle's armor was over one foot thick, consisting of concrete sandwiched between sheets of steel to make ad-hoc composite armor. This made the machine impervious to small arms fire and resistant to explosives; three external explosions and over 200 rounds of firearm ammunition fired at the bulldozer had no effect on it. National Guard units were placed on standby orders under Governor Bill Owens, as the deployment order has to be made directly from the Governor due to requirement of Posse Comitatus Act.