Beaches in Chatham, Mass., have been closed after the sighting of great white sharks in the waters of the area, but scientists in the area are tagging the animals. Greg Skomal, a marine biologist with the Massachusetts Division of Marine Fisheries, says the sharks are being drawn by a large grey seal colony. Bill Chaprales, a commercial harpoon fisherman, says they have to get 4 feet from the shark in order to tag it.» E-Mail This » Add to Del.icio.us