An incisive late-night news series that analyzes the day's top stories with interviews and reports. It occasionally features program-length documentaries, weeklong series and town-hall forums.

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Heart of Darkness

First Aired: January 25, 2002

This five-part report on life in war-torn Congo concludes by examining how lust for the country's natural resources feeds the fighting. “The Congolese are so poor because the Congo is so rich,” says Koppel, who's seen visiting a coltan mine. Adds “Nightline” executive producer Tom Bettag: “It's about armies that are pulling out enormous amounts of money and staying in place because it is in the interests of their governments.” Taped in July 2001.