Focus on something that stirs your soul, it's hard to excel at anything that you don't love.

We know that weapons, heavy weapons continue to flow across the border from Russia into Ukraine. And we have now, in recent days, indications that Russians - Russian military units themselves have, on occasion, fired into Ukraine.

The United States share of the African market it's very small, it's only about 8 percent.

One of the things I love about negotiations is that you have to be able to play it like an orchestra, different instruments for different circumstances. There's sweetness, and encouragement, and cajoling. There's pressure, there's drama, there's ultimatums.

I do leisure reading but I don't get to do it like, at one in the morning. When I getting up at six in the morning, so I do most of my leisure reading on vacation and on airplanes and that sort of stuff.

I was working with a number of African heads of state. And after their initial surprise, I think many of them just treated me as they would anybody else. They had to deal with me as a representative of the United States of America, and the United States of America was too important to be dismissed or ignored on any grounds.

The United States really only accounts for about 3 percent of the economic engagement with Russia. Europe is 40 percent, and so Europe's contribution to this pressure is far more than symbolic. It's very practical. And that's one of the many reasons why we have worked hard to remain in close coordination with our European partners.