WASHINGTON, DC - OCTOBER 16: Warren Buffett 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: Warren Buffett speaks onstage at the FORTUNE Most Powerful Women Summit on October 16, 2013 in Washington, DC. (Photo by Paul Morigi/Getty Images for FORTUNE)