New York is where it is going to begin, I think. You can see it coming. The insect experts have learned how it works with locusts. Until locust population reaches a certain density, they all act like any grasshoppers. When the critical point is reached, they turn savage and swarm, and try to eat the world. We're nearing a critical point. One day soon two strangers will bump into each other at high noon in the middle of New York. But this time they won't snarl and go on. They will stop and stare and then leap at each others