The airplane basically needs winds flowing under and over the wing for it to fly. When that wind or air changes direction, or doesn't flow in that direction, then it causes problems.

With downbursts, they can be as damaging or as destructive as tornadoes.

The sirens are an outdoor warning system. They're not effective late at night when most people are indoors asleep. And because of atmospheric conditions, tornadoes are more likely to form at night.

If you live in a mobile home, during the tornado watch you need to be getting ready to leave, perhaps to the home of a friend who has a basement.

One of our newer systems that we're expecting will kind of put all of these things together. We'll be able to see the radar on one screen, the satellite will be on a screen and then the capability of composing the warning will be right there too.

You do all sorts of analytical things to try to sell (airlines) on the notion that more capacity needs to be put into the market.