Bill Gates speaks while Warren Buffett, chairman and CEO of Berkshire Hathaway, looks on at Columbia University in New York, U.S., January 27, 2017. REUTERS/ NAN-F-3 Optimism New York, Jan. 28, 2017 ( …
Bill Gates speaks while Warren Buffett, chairman and CEO of Berkshire Hathaway, looks on at Columbia University in New York, U.S., January 27, 2017. REUTERS/ NAN-F-3 Optimism New York, Jan. 28, 2017 ( …