world’s richest men

Petr Kellner, 56, the Czech Republic’s only billionaire, was one of five people killed when their helicopter crashed in Alaska during a heli-skiing trip on Saturday. PPF Group, the Czech investment company he co-founded, confirmed his death in a statement earlier today. “With great sadness, PPF announces that Petr Kellner tragically passed away in a helicopter accident in the Alaskan mountains. […]