There are some 7,500 hot air balloons operating in the United States.

He also operated for several years in the United States.

They've been operating in the United States for about five years.

During the last decade, the number of resorts operating in the United States has dropped from 1,000 to 650.

German companies operating in the United States are a vivid example of why.

Foreign firms operating in the United States have similar priorities.

Five other companies operate major assistance centers in the United States.

For the past five years, I have been operating in the United States.

The car - a new 626 model - has 75 percent of its parts coming from companies operating in the United States.

Nearly 100 nuclear plants are operating in the United States, providing 16 percent of the country's power.