A visitor to Yellowstone National Park is dead after an encounter with a grizzly bear on Wednesday morning. The incident occurred on the Wapiti Lake trail, which is located east of the Grand Loop Road south of Canyon Village. The husband and wife couple had traveled about a mile and a half in on the trail Wednesday morning when they surprised a grizzly sow with cubs. In an apparent attempt to defend a perceived threat to her cubs, the bear attacked and fatally wounded the man. Another group of hikers nearby heard the victim's wife crying out for help, and used a cell phone to call 911/KPAX. More here.