Today on The World: What international leaders hope to accomplish at the G20 summit next week; How China is trying to tackle its massive air pollution problem; and a doctor in Sudan pleads for international help as conditions there continue to decline.

President Obama heads to Europe next week for a G20 summit on the global economy. The World's Matthew Bell reports on what could come out of the meeting.

Global economic crisis

Anchor Katy Clark speaks with The Washington Post's Brady Dennis about the latest goings-on in the London office of troubled insurance giant AIG.

Anchor Katy Clark speaks with Dambisa Moyo, an economist from Zambia whose latest book, "Dead Aid," argues that stopping most aid to Africa would actually spur economic growth.

Anchor Katy Clark notes that United Nations chief Ban Ki-Moon called today for a one trillion dollar stimulus plan for the developing world.

The World's Mary Kay Magistad reports on China's efforts to reduce air pollution. Officials in the southern regions of Guandong say they're taking tough measure to cut back on emissions. But the air doesn't seem to be getting cleaner.

The World's environment editor Peter Thomson reports on the squabble over who should be responsible for greenhouse gas emissions linked to Chinese exports to the rest of the world.

Sudanese President Omar al-Bashir went to Egypt today despite the arrest warrant issued for him earlier this month by the International Criminal Court. The World's Jeb Sharp has more.

Sudan war crimes warrant

Anchor Katy Clark speaks with Mohammed Ahmed, a physician in Darfur who runs a treatment center for victims of torture. His clinic was shut down by the Sudanese president's decision to expel some foreign aid agencies from Darfur.

Dr. Mohammed Ahmed: Physician and Human Rights Worker Sudanese Organization for Rights and Peace Building

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