authorities are warning people to stay away from a wildlife refuge in oregon after a group of armed protesters seized a federal building over the weekend. they say they're prepared to occupy the building and the refuge for years. the group is calling themselves citizens for constitutional freedom and they are protesting the federal government over land rights. this all started after a protest to denounce a prison sentence for oregon ranchers, dwight and steven hammond. they were convicted of arson for burning over 100 acres of federal land. their lawyers said the protesters don't speak for the hammonds, that they would seek clemency from president obama. scott cohn is following all of it from princeton, grandchildor we have some new developments. >> that's right. dwight and steven hammonds, the father and son ranchers at the