Tuesday. Another morning in downtown Manhattan. The canyons of the financial district swell with men and women in business suits, briefcases confidently swinging, a cup of coffee or a pastry dangling from one hand. Few of them were bothering to look up at the sky. They owned the sky. Despite the bombing of the World Trade Center that had come in the winter of 1993, or the much earlier, and now ancient bombing by left-wing anarchists on September 16, 1920, confidence was in the air. There had been a Dot Com bubble, but the worst was over.