The upper part of the Clarion River was pretty polluted about 15 years ago. It has since been cleaned up and now there's a black fly problem.

To be a part of this tonight is a thrill.

If there is a good amount of rain that raises the water level, we have to wait for the water to come down so treating is delayed. During that period, we may miss a batch that hatches, which results in us receiving complaints (about black flies).

About 99 percent of the black flies that fly around your face are females. They act like the mosquito in that they require a blood meal.

When I was a kid, it (black fly population) was so bad you couldn't go out of your house. They (black flies) were all over you. Playing ball was terrible; they would be up your nose, in your ears, around your eyes, you would swallow them.

By the end of '06 we're going to have a pretty clear picture of whether or not it's succeeding or failing, ... And success will be dependent upon a government that's representative and a capacity to govern in terms of security.