The U-S International Trade Commission has officially found evidence some overseas steel producers are selling below cost steel to U-S customers. The ruling opens the way for the Commerce Department to investigate charges of unfair trade against producers in Japan, Brazil and Russia. Minnesota's Iron Mining companies hope the investigation will lead to sanctions, which might prevent further cutbacks in Minnesota iron production and the potential of worker layoffs. Minnesota Public Radio's Bob Kelleher reports: The steel industry is a cyclical closely following the strength of the nation's economy. And both have been on a rip. Iron ore production has neared a 17-year high afte