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Had wolf tracks, fox tracks. >> reporter: which is why drew worries less about wild animals and more about the human beings coming towards us on the beach. >> what are you guys up to? >> we work for a surveying company up in anchorage. >> reporter: they are hesitant to admit they're doing work for the pebble mine, one of the most controversial projects in alaska history. >> this spot right here. this is it. this is where it all started. >> about 80 miles from the beach, a canadian mining company called northern dynasty discovered enough buried treasure to propose the biggest gold and copper mi...

Francisco, los angeles and new york. now, supporters, tony, of arizona's immigration law want the government to go after sanctuary cities. republican congressman duncan hunter says that if immigration enforcement is a federal responsibility, then the government should pursue sanctuary cities for impeding federal law. the justice department says there's a difference between a jurisdiction deciding not to use its resources to enforce federal law and a state coming up with its own law interferes with federal law. >> what are the cities saying? >> they say they don't hold back information from i.c...