creditwastatepatrol-oso_landslide_wspDavid Williams has been busy as NSWA president and our local interpreter of events making the national news. In his Geology Writer blog, David explains the geological and human factors that caused the Oso landslide and how to look for slide and slump signs in your neighborhood. Scroll farther for David’s thoughtful and thorough takes on the mammoth, the Bertha boring machine, and Seattle’s tunnel dreams. photo: Washington State Patrol