 Well, environmental groups have filed two more lawsuits challenging the Interior Department's decision to reinstate the federal mineral rights leases for the proposed twin metals copper nickel mine in northeastern Minnesota. One of the lawsuits was filed Monday by three national groups, the Wilderness Society, the Center for Biological Diversity, and the Isaac Walton League of America. The other was filed by the Minneapolis-based Friends of the Boundary Waters Wilderness. They follow a similar lawsuit filed Thursday by nine businesses that rely on the Boundary Waters Canoe Area plus northeastern Minnesotans for Wilderness. Twin Metals Minnesota wants to build an underground mine near Ealy. The Interior Department reinstated the leases last month, reversing a decision by the Obama administration which cited the potential harm to the boundary waters from acid mine drainage.