This is just incomprehensible:
GRANBY, Colo., June 5 -- An angry citizen with a grudge against City Hall and the local newspaper was found dead Saturday morning in his home-made armored tank after a destructive rampage that turned parts of downtown Granby into rubble heaps Friday -- but injured no one except the perpetrator.
Working for months in a closed garage, Heemeyer equipped an old bulldozer with three television cameras and monitors so he could see to steer. He cut portholes for his guns, then welded a tight enclosure around them so police bullets could not penetrate. For armor, he poured 12 inches of concrete between metal plates welded to the vehicle. Police found two semiautomatic machine guns, a .223-caliber rifle and two handguns in the vehicle. All those weapons are legal in Colorado.
Heemeyer started down his road to revenge Friday afternoon. He bashed in the cement plant, then rumbled through town to the combination City Hall and library. Librarian Cathy Pritchard said she said she hustled a group of children attending story hour out the back door just before the building fell.
He apparently knocked down several buildings and damaged several others beyond repair. Then he killed himself. The story mentions that he was an angry guy nursing several grudges, but I have trouble understanding how anything could drive someone to this.