L-3's technology, developed over two years, turned out to be just what airports needed after Sept. 11, 2001.

This service showed that Evansville's airport needed to grow and plans were put in place for expansion.

Opponents concede that the airport needs a new terminal, but say not four times the size of the existing structure.

"Today, they want us to cut down certain trees because the airport needs rights to certain runways," he said.

An airport needs to build a runway for 4 different aircraft types.

But he said the airport would need to buy more plows, adding, "We will not get caught in that situation again next year."

According to the study, 15 airports will need to add capacity to accommodate growth over the next decade.

At the beginning of the investigation, Tortrakul had warned that the airport might need to be closed for three years.

Some airports need 60 to 65 machines, he said.

According to estimate, this airport will need an investment capital of US $250 million.