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AIDS is the number one killer in sub-Saharan Africa, and it's the fourth leading cause of death worldwide. Researchers have been trying to develop a vaccine to protect people against HIV, the virus that causes AIDS. So far, the results have been disappointing. From the International Aids Conference in Capetown, South Africa, KPBS Health Reporter Kenny Goldberg tells us the search continues.

Steve Inskeep speaks with NPR's Scott Horsley, who is traveling with President Obama in Asia, about the Group of 20 summit in Seoul, South Korea. Horsley says the leaders agreed to develop yardsticks to help detect when a country is running too big of a deficit or too big of a surplus.

The U.S. and others say they are ready to broaden the leadership of key international institutions, but the emerging powers may not be satisfied with a share of the leadership. They may want to change the institutions themselves and the principles that guide them.

The goal of this week's two-day summit in Seoul, South Korea, is to create a joint plan to rebalance the global economy. But tensions are building over currency manipulation and trade, and the U.S. Federal Reserve’s decision to flood the economy with more money through quantitative easing hasn't helped.

President Obama on Tuesday heralded a "comprehensive partnership" between the United States and Indonesia, a fast-growing country with the world's largest Muslim population.

Mayor Sanders said Governor Schwarzenegger will return to Qualcomm stadium tonight to make sure San Diego residents have everything they need. Sanders said his office will coordinate with the state to

This week, San Diego State University was one of five sites around the nation testing new emergency response technologies. The exercises demonstrated tools developed for the military that are now available for civilian first responders. A lot of money is being invested in powerful new surveillance tools, but are these making us any safer?

Tunisian and Egyptian political activists used Facebook and Twitter to organize protests and publicize breaking news. Harvard's Jillian York discusses the use of social media platforms for digital activism, and cases in which governments have blocked the services or compromised user privacy.

The recent emergence of Kim Jong Un as the designated successor to North Korean leader Kim Jong Il once again put the spotlight on the secretive communist nation. Yet little has been said about U.S. efforts to re-engage North Korea.

In the first public confirmation of the succession plan, a top official in the ruling party indicated to broadcaster APTN that Kim Jong Il's youngest son will succeed him as leader of the reclusive communist nation.