It was when I realised I had a new nationality: I was in exile. I am an adulterous resident: when I am in one city, I am dreaming of the other. I am an exile; citizen of the country of longing.

The trains are central to Bombay just as the subway is central to New York; they are the great social laboratory of that city. And today, they became a charnel-house.

The great thing about Bombay is its open, generous heart. I hope - I know - that this spirit will endure. Bombay will adjust.

Commuter trains are the easiest target for terrorists, as we have seen in Madrid, London, and now Bombay. But it is difficult for a Westerner to comprehend the kind of overcrowding in a Bombay local train; they ferry six million passengers a day. A bomb that goes off in one of those compartments will have maximum impact.

In the looking, I found the cities within me.

I am an exile; citizen of the country of longing.

There have always been elements in the Pakistani state that have been hostile to India; which is not to say that the Pakistani government as a whole is responsible for bombing Indian cities. But I think there are entities in the Pakistani security services that operate more or less autonomously. Their role certainly needs looking into.