Video shared on social media captured the moment a bridge was swept away by raging floodwaters on the Yellowstone River Monday. All Yellowstone National Park entrances have been temporarily closed in the wake of "unprecedented" flooding causing "rockslides and mudslides on roadways," the National Park Service announced Monday. The flooding was sparked by near record-high temperatures melting high-elevation snow over the weekend. Rivers are at peak levels now and are forecast to recede in the nex