Janet Yellen just became the most powerful woman in US history

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So the US Senate has made it a done deal. Federal Reserve vice chair Janet Yellen will be the next head of the powerful US central bank, making her arguably, the most powerful woman in US history. She’ll take over after current chairman Ben Bernanke’s term ends on Jan. 31. Here’s a look at all of the major rungs on Yellen’s climb to the top.