Fire and ice: a soot removal technique using dry ice blasting

A welder's spark touched off the attic fire in the Sevier County Recorders Office (Richfield, Utah, USA) on 2 May 2006, igniting a blaze that ripped through the crawl space and greedily consumed the building's paper-backed insulation. The fuel readily spent, the fire burned itself out 15 minutes later, sparing the structure but coating everything below the rafters with fine, powdery soot.