FILE - Warren Buffett, chairman and CEO of Berkshire Hathaway, smiles as he plays bridge following the annual Berkshire Hathaway shareholders meeting in Omaha, Neb., May 5, 2019. (AP Photo/Nati ...

Three generations of Buffetts: from left, Warren, Howard G. and Howard W. The younger Buffett father and son wrote a book about their efforts to end global hunger, “40 Chances: Finding Hope in a ...