Whitebark pine that feeds grizzlies is threatened, US says

In this 2013 photo, cone collectors like Gabe Thorne, of Hamilton, head up into the high country around the west to climb to the very top of whitebark pine and collect cones from disease-free trees in Sula, Mont. U.S. officials say climate change, beetles and a deadly fungus are imperiling the long-term survival of the high-elevation tree found in the western U.S. (Perry Backus/Ravalli Republic via AP, File)