Somalia tops the list of nations named in Foreign Policy Magazine's annual index of "failed states."

Piracy and terrorism-plagued Somalia is followed by four other African nations - Chad, the Sudan, Zimbabwe, and the Democratic Republic of Congo - in the top five.

And despite the presence of hundreds of thousands of U.S. troops as part of a nearly decade-old battle that promised stability, Afghanistan and Iraq rank sixth and seventh. One of America's principal allies in the so-called war on terror, Pakistan, is number 10.

"None of the current top 10 has shown much improvement, if any, since Foreign Policy and the Fund for Peace began publishing the index in 2005," the magazine said on its website.

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