She understands the pull of this ultimate challenge for her husband.

He reveals: 'It is the ultimate challenge of my career.

I love responding to that, and this right here is the ultimate challenge, as we try to win another title.

"The ultimate challenge will be to keep the people with you all the time."

"It's the ultimate challenge you can put yourself through," she said.

Here, finally, they sensed the ultimate challenge of their flight.

I am there to give them the ultimate challenge and I do.

For most movie actors, though, Shakespeare is the ultimate challenge.

That's the ultimate challenge for me as a coach, to keep the winning going.

New York, he said, is still the ultimate challenge, as the world's biggest public school system.