Photos: Tornadoes sweep across MinnesotaJune 18, 2010 10:45 AMA street sign in Wadena, Minn. Friday, June 18, 2010, after a tornado uprooted it Thursday. The tornado that tore through Wadena was one of more than 30 twisters that hit Minnesota on Thursday.MPR Photo/Jeffrey ThompsonShareTwitterTwitterFacebookFacebookMailEmail