Groups sue feds over mineral leases near the Boundary Waters

A core sample drilled from underground rock near Ely, Minn.
A core sample drilled from underground rock near Ely, Minn., shows a band of shiny minerals containing copper, nickel and precious metals, center, that Twin Metals Minnesota LLC, hopes to mine near the Boundary Waters Canoe Area Wilderness in northeastern Minnesota.
Steve Karnowski | AP 2011