Where Is the World's Largest Great White Shark?

Marine biologist Tom Hird’s search for the world's largest great white shark is featured during Discovery's "Shark Week," hosted by John Cena. They're looking for a 6,000-pound shark. Also on "Shark Week," prepare for an alien invasion. Wildlife biologist Forrest Galante searched for a rarely seen and little-known species of sharks. Cameras captured a rare velvet dogfish shark giving birth. Inside Edition's Jim Moret has more.