Associated Press: It’s slowly drifting across Arctic waters, an iceberg four times the size of Manhattan that broke off from a glacier in Greenland over the weekend. Potentially in the path of this unstoppable giant are oil platforms and shipping lanes — and any collision could do untold damage. In a worst case scenario, large chunks of it could reach the heavily trafficked waters where another Greenlandic iceberg sank the Titanic in 1912. It’s been a summer of near Biblical climatic havoc …