New doc revisits the "Killdozer" rampage in a small Colorado town

Tucked in the mountains between Winter Park and Grand Lake sits a small community of 2,000 people that was thrust into the national spotlight when one of its residents turned a bulldozer into a makeshift tank and went on a rampage, destroying much of the town. Now, a full-length documentary, "Tread," about that incident, and the man behind it, is coming to Denver theaters for a short run in February.