With a tremendous splash and a profound thud, 30 old subway cars were dropped into the ocean off the coast of Cape May this morning, enlarging the nation's most extensive artificial reef system. State officials say the 18-ton cars -- stripped of their windows, wheels, axles and flooring -- will soon become home to a variety of ocean species. "They provide a very good habitat for marine life," said Hugh Carberry, the state Department of Environmental Protection's reef coordinator.Workers dump New York City subway cars into the ocean off of Cape May on Monday. After a five year moratorium, New...