Host Lisa Mullins speaks with Steven Simon, a senior fellow in Middle Eastern studies with the Council on Foreign Relations about Hezbollah's relationships with Iran, Syria, and Lebanon.

The World's Roxana Saberi reports from Tehran that Iran denies accusations of offering weapons and training to Hezbollah fighters in Lebanon. Iran says its support of Hezbollah is purely spiritual.

Kate Seelye reports from Lebanon on the evacuation of Americans from Lebanon.

Today's Geo Quiz answer is the Somalian capital, Mogadishu, the hometown of a new figure on the international rap scene. The World's Marco Werman speaks with rapper K'naan, about his journey out of war-torn Somalia.

Where in the world will we go today?

The World's Mary Kay Magistad has the first of our four-part series on China's role in the global environment. She begins with a look at how the country became home to 16 of the world's 20 most polluted cities.

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Correspondent Kate Seelye reports from Lebanese capital, Beirut, on the continued bombing of the city by Israeli forces.

Host Lisa Mullins speaks with a man whose son, an Israeli soldier, went missing in Lebanon 24 years ago.

The World's Aaron Schachter reports that a majority of Israelis support their government's tough stance against Hezbollah and Lebanon.