Nanotechnology - the science of manipulating matter at the molecular level - could one day turn cities greener, make food healthier, and even help people live longer. But the trade-offs of these new technologies could compromise or outweigh any potential advances. When scientists work with single atoms and molecules 80,000 times smaller than a human hair, there exists both great promise and critical concerns. Nanotechnology: The Power of Small, a three-part series of Fred Friendly Socratic Dialogues, explores the societal, personal, ethical, and practical implications of advances in nanotechnology. Host John Hockenberry asks policymakers, scientists, journalists, and community leaders to wrestle with real-world hypotheticals that will impact Americans' privacy, security and health, and the environment.

Sundays, 6/22-7/6/08 from 2:30-3:30 p.m. ET