And today we do face serious new challenges in the area of defense policy.

The American team's approach has changed with the new challenge.

"The new challenge is to find common ground where we, the people, come together."

"I do feel like a new challenge can keep you young."

Over the years, I've learned a thing or two and am looking for a new challenge.

I need a new challenge, something that'll keep me going and moving.

Perhaps this new challenge would be the most significant yet.

"So it was just the right time for a new challenge."

Look, we're going to face some serious new challenges in the next four years.

We must keep them in order to meet new challenges.