The two areas that are changing... are information technology and medical technology. Those are the things that the world will be very different 20 years from now than it is today.

Nigeria has moved into low-middle-income, but their north is very poor, and the health care systems there have broken down.

My wife thinks she's better than me at puzzles. I haven't given in on that one yet.

Paper is no longer a big part of my day. I get 90% of my news online, and when I go to a meeting and want to jot things down, I bring my Tablet PC. It's fully synchronized with my office machine so I have all the files I need.

Even when things are stable, that's not easy [to work in Africa] because there are not roads, and the weather is tough, the education system hasn't been there. But this is how you get great countries, is step by step.

I have a nice office. I have a nice house... So I'm not denying myself some great things. I just don't happen to have expensive hobbies.

Exposure from a young age to the realities of the world is a super-big thing.