“Farmers who grow fruits, vegetables and nuts need five basic things: soil, seed, sun, water and honeybees. The pollination of crops by honeybees is crucial to the production of one-third of all the foods we eat. So when billions of bees began to mysteriously disappear in 2006, it set off a number of warning bells. Steve Kroft speaks with beekeeper David Hackenberg, who first noticed the problem, and some scientists working to bring the bees back.”