Many of our nation's crops, and subsequently our food supply, rely on bees to keep them fertile. But in many places throughout the country, bee colonies are dying off due to a condition called Colony Collapse Disorder. This year alone, 36 percent of cultivated bee hives in the U.S. have fallen prey to CCD, a situation that is sending farming communities into a tailspin. In his book, "A Spring Without Bees," Michael Schacker explores the causes and effects of the waning bee population. Larry speaks with David Hackenberg about Schacker's book, the bleak future for bees, and the threat to our food supply.