A powerful Washington player takes on Walgreens to protect tiny Antarctic krill

The Antarctic krill, tiny shrimplike crustaceans, are a key part of the ocean's food chain for whales, penguins and seals. Increasingly, krill have also become part of the human food chain - krill oil, with omega-3 fatty acids, is advertised as a wonder drug that may help combat heart health, high cholesterol and even improve our moods.