TUCSON, Ariz. - The National Science Foundation agreed to halt construction of a $13 million mountainside telescope complex after an American Indian tribe filed a federal lawsuit claiming the site is sacred. The foundation said it will work with the Tohono O'odham Nation to assess the environmental and cultural value of the Kitt Peak area before resuming work on what the lead scientist said would be the most advanced system of its kind in the northern hemisphere."We are being very deferential to ensure that the tribe is on board every step of the way," said Charisse Carney-Nunes, a foundation attorney.The...