. >> right now we are on the coast of lake superior, which is frozen over solid. thousands of people have come to see some ice caves that are just around the corner here. you can see a line of people just as far as you can see. >> it's a pristine landscape but underneath the natural beauty lies a coveted resource: two billion tons of iron ore. >> a mining company called g-tac is planning to dig what could be one of north america's largest open pit mines. it would start with a four and a half mile open pit, and could eventually stretch twenty-two miles. >> it would be upstream of a massive wetland that feeds lake superior, part of america's great lakes, which make up 20% of the world's surface fresh water. >> fault lines has come to wisconsin, where corporate interests have set off a battle for the very soul of the state pitting those who wish to extract natural resources against those who wish to preserve them. >> we're on our way to meet democratic state senator bob jauch who represents this area. >> he wants us to meet at one of his constituent's house to sit aro

. >> right now we are on the coast of lake superior, which is frozen over so

. >> right now we are on the coast of lake superior, which is frozen over solid.