"A new world requires a new leader," he called out to Khan.

This newly evolving world will require its own structures.

"The new world requires responses that we never had before."

Because a dangerous world still requires a sharpened sword, I will rebuild our military.

And such a world, more than ever, requires one to pay close attention to motivations as well as actions.

He said food reserves are at a 50-year low but the world requires 50% more energy, food and water by 2030.

We adopted this approach for two reasons: first, because this is what the world required.

It didn't seem fair that the world should require more effort from me, after everything I'd already done.

He added, "They realize that the real economic world now requires something after high school."

One small 'plane a day would carry all the urgent contracts the world requires back and forth across the Atlantic.