<p>This Feb. 17, 2010, photo shows an aerial view of the town of Libby Mont. - a town of 3,000 along the Kootenai River has emerged as the deadliest Superfund site in the nation's history. A long-delayed cleanup proposal for a Montana community where thousands have been sickened by asbestos exposure would leave the dangerous material inside some houses rather than remove it, as government officials seek to wind down an effort that has lasted more than 15 years and cost…

May 6, 2015