In the meantime, these results present a challenge to policy makers.

I don't think we've ever beaten them. They're very athletic and will present a huge challenge.

The Winter Olympics used to present a promotional challenge. Now there?s speed, danger and an Olympic team that is more identifiable to a more diverse cross-section of America.

The Iraqi elections present a real challenge and also an opportunity to achieve the goal of electing a strong and credible leadership.

The crowds are going to be more than enough to present a challenge for the police and everybody else, and Muhammad Ali will be participating in bringing down the ball, which makes it a truly unique occasion,

That's a positive. But it does present a challenge to us as we continue to grow.