The Hopi Tribe has a message for the Sierra Club and other environmental groups: Keep out! That is the response of the Hopi Tribal Council on Monday to what it says has been continuous concerted attacks from local and national environmental groups "bent on advancing their interests and agenda at the expense of the Hopi Tribe and its sovereign interest." The council wants the Sierra Club and other environmental groups and on-reservation organizations affiliated with these groups to know they are not welcome on the Hopi Reservation, declaring them persona non grata - no longer favored or welcome. By a...