The first woman to lead the IMF in its 60-year history, Lagarde assumed control at a perilous moment -- and we're not just talking about the ouster of predecessor Dominique Strauss-Kahn. The former French finance minister was thrust into negotiations over how to reverse the deepening European debt crisis, which she's tackling by calling on central bankers to launch a bold, coordinated push to juice short-term job creation and tackle long-term budget deficits.
The full list of Fortune's annual ranking of America's leading businesswomen.
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