Mar. 3, 2010: Keeping tabs on sharks

Last September, five great white sharks were electronically tagged off the coast of Chatham to track the migratory pattern of the predators. Now the state has released the results of what’s been discovered about the mysterious great white shark. Among Emily’s guests are Greg Skomal, a senior marine biologist from the state’s Division of Marine Fisheries, Dan McKiernan who oversaw the tagging and John Mandelman, a shark expert from the New England Aquarium.