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Sudan is a nation on the edge, hurt by a civil war and a refugee crisis. And America is on a lonely mission to help.

FOX News' Heather Nauert led a team to Sudan in September to examine the problems facing the east African country and to tell the stories of Sudanese living in a turbulent time. Nauert's reporting led to a four-part series, first aired on FOX News and expanded upon for FOXNews.com.

Click on the highlighted words below or on the links in the box to the right to learn more.

Part One: Bin Laden's Path Crossed Through Sudan

The last time Americans heard this much about Sudan was when the country welcomed Usama bin Laden in the 1990s. From Sudan, bin Laden plotted attacks against American interests overseas, including the bombings of two U.S. embassies in Africa. The resulting retaliation by the Clinton administration led to questions about the Americans’ target. Click here for the story.

Part Two: From Anger to Rage in the Sudan

At an 80,000-person refugee camp in the Darfur region, refugees took revenge on the Sudanese government official in charge of the camp that is now their home, blaming him for the government's support of a brutal militia called the Janjaweed. Click here for the story.

Part Three: In South, Sudan Devastated by Civil War

While the world's attention has been focused on the genocide ravaging Darfur, the humanitarian crisis that has claimed 50,000 lives so far is not the only one to consume the country. A civil war between the Arab north and the Christian and black tribal south has raged for two decades and killed two million people. Click here for the story.

Part Four: U.S. on Lonely Mission in Sudan

The United States is pushing for U.N. sanctions against Sudan. But U.S.-sponsored resolutions have met resistance in the U.N. Security Council — particularly from China and Pakistan, which have major oil deals in the east African country. Algeria, which is a fellow Arab league member, also is an obstacle. Click here for the story.

Commentary: Reflections on Sudan

FOX's Heather Nauert offers a first-person account of what it was like as an American in Sudan. She also explains her experience viewing the tragedy that has hit parts of the nation and the hope some villagers have that help is on the way. Click here for the commentary.