Shark v. Seal: Who Wins?

There's been a rise in shark sightings on the Cape this summer — drawn not by humans in the water (pace "Jaws") but by an abundant population of seals. So ... can we drive away the sharks by culling the seals? As WGBH science editor Heather Goldstone told Bob Seay, it's not the first time marine experts have proposed this strategy.