A new alert on global warning: Melting rate of Patagonian ice fields has doubled; Guest Lester Brown, author of Plan B: Rescuing a Planet under Stress and a Civilization in Trouble talks about the threat to the global environment; China becomes 3rd nation to send astronaut into outer space, what does Senator Joe McCarthy have to do with it?; Scientists claim we may be able to create a space elevator; GW Bush goes to Asia, will not sign non-agression pact; Study focuses on the effect of the AIDS drugs.