Blood and bait: The growing concern about the survival of a prehistoric species, the horseshoe crab

Here & Now's Scott Tong takes a trip to a Delaware Beach to see horseshoe crabs mating. The undignified process takes on a new resonance amid considerable concern about a decline in population, as the crabs are harvested for their blood and as bait. Multiple environmental groups are now asking the U.S. government to designate horseshoe crabs as an endangered species.