A huge wandering iceberg is tearing up the Antarctic like a slow-moving bull in a frozen China shop. The roaving destructor, named B-15A, slammed into the Drygalski ice tongue a month ago and broke off at least two city-sized chunks. Now it is poised to strike another feature sticking out from the continent. At 71 miles (115 kilometers) long, B-15A is the largest free-floating object in the world. It is expected to lumber into the Aviator Glacier any day now, scientists with the European Space Agency said Tuesday. The researchers released a satellite image taken May 16. Aviator was discovered...