http://www.hcn.org These are the search results for the query, showing results 1 to 3. http://www.hcn.org/issues/44.3/environmental-warrior-martin-litton-is-still-fighting-at-95 Martin Litton, who has spent his entire life fighting to preserve Western landscapes, is still battling to save California’s giant sequoias. No publisher Jane Braxton Little Martin Litton environmentalists Grand Canyon Dories Forest Service logging Sequoia National Park Sierra Club Dinosaur National Monument 2012-02-29T13:45:50Z News Article http://www.hcn.org/issues/43.17/killing-for-conservation-in-national-parks Getting weeds out of the national parks is an endless war that can never be won, but many Park Service employees are willing - and happy - warriors. No publisher Amy Whitcomb park rangers weeds marijuana National Park Service Amy Whitcomb Sequoia National Park invasive species Kings Canyon National Park 2011-10-19T20:31:51Z News Article http://www.hcn.org/issues/268/14555 National Park Service wilderness coordinator Jim Walters resigns in frustration over the agency’s neglect of wilderness, after the superintendent of Sequoia and Kings Canyon National Parks allows helicopters in wilderness areas No publisher Matt Jenkins Public Lands Recreation National Park Service Jim Walters wilderness areas Sequoia National Park Kings Canyon National Park helicopters in wilderness Richard Martin Fran Mainella Randy Jones wilderness management Lake Mead Glen Canyon 2010-02-05T09:56:12Z News Article