It's not enough to just test athletes. The athletes themselves need to fight for their right to compete against clean athletes.

Education and prevention are not enough when there is a culture of fraud.

In the old days, athletes got worked up about the strict rules - today they get worked up about these rules being ignored elsewhere.

In order to expose a system though, you need whistleblowers.

I have never heard a doping offender say he felt good about doing it. Not a single one. Some athletes justify their actions by saying it enabled them to afford a bigger house or a better car. But they are never really happy. They know that they are not real winners.

Being skeptical is part of my job, to question every amazing achievement. That's always there. But I am also capable of turning down the cynicism. The basic idea of sports, the fairness, the competition, remains a beautiful thing.

The Olympics unite the world and inspire us to be a better version of ourselves. The competitions motivate the spectators, and the athletes' message is: You should have more confidence in your ability to achieve things, you should dream more.