Close Thinning the bison herd at the Grand Canyon The National Park Service at The Grand Canyon is experiencing a boom in bison population and preparing a reduction plan for the park. KPNX 6:26 PM. MST September 13, 2017 TRENDING VIDEOS NOW: LulaRoe or LulaNO? Man killed by suspected drunk driver in Glendale "Sammy the Bull" family member speaks out Student creates brilliant 3x5 cheat sheet Vigil for missing baby in Mesa VERIFY: Are strangers following you on Facebook? Hamilton High School football hazing timeline of events Arizona's Most Wanted: Widow searches for her husband's killer Valley cities bid for Amazon HQ Boat washes ashore Melbourne Beach in Florida More Stories Trump tweetstorm blasts McCain for opposing Obamacare repeal Sep 23, 2017, 7:43 a.m. Russian government targeted Arizona voter… Sep 22, 2017, 3:08 p.m. Principal and athletic director removed from… Sep 22, 2017, 3:19 p.m.