how to deal with it

While I was reading the other night, Calvin was watching a National Geographic special on the oceans. At some point they started a segment on orca whales, and Calvin turned to me excitedly to inform me that they "had no enemies," would "jump out of the water onto ice to eat seals," and "wouldn't be afraid of humans." 

 After some thought, he said, "Dad, I know how to stop them." When I asked him what he had in mind, he stated very confidently, "land mines."