WYOMING v. U.S. DEPT. OF INTERIOR

State of WYOMING; Park County Commissioner Hall, in His Official Capacity, a/k/a Bucky Hall; Park County Commissioner French, in His Official Capacity, a/k/a Tim A. French; Park County Commissioner Brewer, in His Official Capacity, a/k/a Bill Brewer; Park County Commissioner Siggins, in Her Official Capacity, a/k/a Jill Shockley Siggins; Park County Commissioner Fontaine, in her official capacity, a/k/a Marie A. Fontaine, Petitioners-Appellees, v. UNITED STATES DEPARTMENT OF INTERIOR; National Park Service; United States Department of the Interior Secretary, in His Official Capacity, a/k/a Ken Salazar; National Park Service Director, in Her Official Capacity, a/k/a Mary Bomar; National Park Service Regional Director Intermountain Region, in his official capacity, a/k/a Michael Snyder, Respondents-Appellees. International Snowmobile Manufacturer's Association, Inc.; American Council Of Snowmobile Associations; Blue Ribbon Coalition, Inc.; Teri Manning, individually, Intervenors-Appellees, National Parks Conservation Association, Intervenor-Appellant.