American Honeybees pollinate $15 billion worth of crops each year. That's more than one-third of the food we eat. But honeybees are under attack, by parasites, disease and bad weather. There's been a 40% decline in the past two decades, according to the U.S. Department of Agriculture. Beekeepers here in East Tennessee are working just as hard as their charges to keep them healthy. Yet exotic pests and a new mysterious malady are undermining their work. WUOT's Ann Lloyd reports... 