A lawsuit filed Wednesday by the relatives of a half dozen people killed in the massive Oso, Washington mudslide claims that the state, Snohomish County and a logging company helped turn a historically unstable hillside into a "wall of death." At least one other similar Oso lawsuit has been filed. The state said it plans to fight both suits. The March 2014 mudslide killed 43 people, destroyed 49 buildings and closed a state highway for six months. President Obama declared the town a federal disaster area.