So the question arises: What is America's role in this volatile new world?

"It seems to me that we live in an increasingly complex and volatile world," he said.

But in the volatile world of Chinatown street gangs, anything can cause sudden violence, residents said.

In the volatile world of Indian politics, alliances can shift overnight.

Once again Americans are beginning to wonder how vulnerable they may be in a volatile and sometimes treacherous world.

Another thing we are going to have to get used to in our low growth but volatile world is persistently low interest rates.

Retailing companies provide the closest thing to a safe harbor in the volatile world of video games.

But nothing is likely to stay the same in the volatile world of cigars.

How will such a style mesh with the volatile world of the Web, where today's hot stock can easily be tomorrow's road kill?

"I think that's a reasonable guidance in a very volatile world," he said.