Nurses in the Twin Cities and Duluth are going on strike.  Members of the Minnesota Nurses Association voted yesterday to authorize a walkout.  If there is no new contract in the next ten days, a strike will take place on December 11th and last until December 31st.  Nurses at St. Luke’s hospitals in Duluth and Two Harbors opted for an open-ended walkout until a deal is reached.  The union’s sticking points are improving staffing and better pay.