Bison Attacks Woman Taking a Selfie at Yellowstone

Yellowstone National Park officials are warning tourists to keep their distance after a bison flipped a woman into the air as she posed for a selfie with the massive beast. The dangerous encounter was the fifth run-in this year between park-goers and buffalo at the park, which prohibits people from getting within 25 yards of bison. Park officials say the 43-year-old Mississippi woman turned her back on the animal Tuesday evening to get a photo with it on a trail near Old Faithful.