I was born and raised in New York, and though I left America years ago, I still have family and friends there. Inevitably, anxieties and memories hung heavily in the air as the eerily crystalline images beamed into my home from across the Atlantic. In this I was hardly alone. New York has long been a world city, indeed the prototype of the teeming cosmopolises now found on every continent. I was only one of the many millions scattered around the globe who felt some personal link to the unfolding horror.