Warren Buffett, chairman and chief executive officer of Berk [Getty Images]

UNITED STATES - JULY 15: Warren Buffett, chairman and chief executive officer of Berkshire Hathaway Inc., right, walks with Astrid Menks before a session at the annual Allen and Co. Media and Technology Conference in Sun Valley, Idaho on Saturday, July 15, 2006. Buffett, the world's second-richest man, marked his 76th birthday yesterday, August 30, 2006, by marrying longtime companion Menks. (Photo by Matthew Staver/Bloomberg via Getty Images)

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