ArcelorMittal chief executive Lakshmi Mittal became chairperson of the steelmaker on Tuesday, increasing his control over the company. "I could not have asked for a better chairman during the time of integration," Mittal told the company's annual shareholder meeting.
It must count among the world's most genial rivalries. Two of the planet's richest men regularly play epic games of online bridge and collaborate over handing out their billions. But Warren Buffett has unseated his friend, Bill Gates, to become the wealthiest individual on the globe.