NEW : Sierra Club says border waivers are unconstitutional . Homeland Security chief : Waivers will enable security projects to move forward . Environmental , land-management laws will be bypassed for U.S.-Mexico fence . `` Criminal activity at the border does not stop for endless debate or protracted litigation , '' Chertoff said . Comment:
NEW : Sierra Club says border waivers are unconstitutional . Homeland Security chief : Waivers will enable security projects to move forward . Environmental , land-management laws will be bypassed for U.S.-Mexico fence . Comment: