Two years ago today, I was sitting at my computer and listening to the radio, much as I'm doing right now, when I heard the news. In short order I rushed over to a little park in my Brooklyn neighborhood that had a perfect view of the harbor and lower Manhattan. It's across the street from a hospital, and about 100 of us -- nurses, residents, orderlies, deliverymen and neighbors -- watched, mostly in complete silence. From there I witnessed the collapse of the first tower. It was obvious then that the second one would fall, too, but it was too much violence; I didn't want to see it. By the time I'd walked home (maybe 8 minutes), my arms were covered in ash, pushed my way by the prevailing winds.
