A routine flight to tag a cow moose took a bizarre turn this weekend when the tranquilized animal charged the tail section of a hovering helicopter, collided with the rear rotor and brought down the aircraft. The injured animal was euthanized at the scene. The incident happened near the southeast town of Gustavus late Saturday afternoon, and baffled officials with the Federal Aviation Administration and the Alaska Department of Fish and Game. "I have never personally seen or heard of an injury of this type, caused to an animal by an aircraft," said Doug Larsen, regional supervisor for the Division...