Energy plays an important role in the national security of any given country as a fuel to power the economic engine.

"I'll bet if you went around the country to different cities, you'd find health care a big economic engine."

"We are not looking for them to be economic engines."

Our national security budget must not be used as an economic engine.

The economic engine would be based on renewable resources at this point.

Economists believe the green economy will be the economic engine of the 21st century.

We can change the direction of America's economic engine and become competitive again.

Even in a recession, America is the world's economic engine.

Risk is essential to fuel the economic engine of our nation.

But it was at least a way for the state to help the city, its biggest economic engine.