The billion dollar plan to restore the Everglades is about to meet a challenge. The 400-member Miccosukee Indian tribe, native to the region, is frustrated with the pace of the cleanup effort, and will soon insist that water entering its reservation be cleaner than the state now requires. The tribe's mandate is years ahead of the state's timetable and as Alexis Muellner reports, that's causing concern and conflict in southern Florida.