As part of her seven-nation tour of Africa, Secretary of State Hillary Clinton visited South Sudan. NPR's John Burnett visited the one-year-old nation during Clinton's visit. He joins guest host Susan Stamberg to talk about Clinton's visit and the challenges facing the new nation.

NPR's Tom Goldman joins guest host Susan Stamberg to talk about his impressions of the London 2012 Olympics so far and what's in store for next week.

You find out so much about a country when it's hosting the Olympics. It's almost as if the Games lay bare a nation's soul. NPR's Philip Reeves says that's what's happening in Britain. He's finding the experience unnerving, as he explains in this letter from the Olympics.

Sprinter Oscar Pistorius, the double-amputee who has for years sought to run in the Olympic Games, finally got his wish Saturday, when he ran in a preliminary heat in the men's 400 meters in London's Olympic Stadium. But he wasn't content with making history as the Olympics' first amputee runner.

It's estimated that about 100,000 koalas remain in the wild as urbanization envelops their habitats along the Australian east coast. Although Australia recently put the marsupial as "vulnerable" on its endangered species list, advocates say the status doesn't give the animals maximum protection.

A coup in the capital and a rebellion in the north have put Mali's cultural treasures at risk. Ancient holy sites have been damaged or destroyed, and an international music festival in the Sahara Desert may be in jeopardy.