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WASHINGTON, DC - OCTOBER 16: Senior Vice President of Global Market Development of General Motors Mary Barra speaks onstage at the FORTUNE Most Powerful Women Summit on October 16, 2013 in Washington, DC. (Photo by Paul Morigi/Getty Images for FORTUNE)
WASHINGTON, DC - OCTOBER 16: Senior Vice President of Global Market Development of General Motors Mary Barra speaks onstage at the FORTUNE Most Powerful Women Summit on October 16, 2013 in Washington, DC. (Photo by Paul Morigi/Getty Images for FORTUNE)

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