Brazil's biggest city on Monday became the first in the world where Uber offers on-demand chopper rides between airports, hotels and convention centers.
When the billionaire business mogul launched his first startup at age 15, he didn't even know what the word 'entrepreneur' meant. That was 50 years ago. We caught up with him to see what it means to him now. (Hint: By-the-seat-of-your-pants adventure and loads of it.)