Factbox-Warren Buffett and Berkshire Hathaway at a glance
Tens of thousands of people are in Omaha, Nebraska, to attend the annual shareholder weekend for billionaire Warren Buffett's Berkshire Hathaway. Buffett, 94, is expected to answer shareholder questions over four and a half hours at Berkshire's annual meeting on Saturday. Vice Chairman Greg Abel, 62, who is expected to succeed Buffett as chief executive, will join him.