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.

In the looking, I found the cities within me.

While I was writing my book, I got a top police official in Bombay an invitation to study terrorism at the Rand Institute in Washington DC. This would have helped the city enormously, as he was the detective who cracked the '93 blasts case. But the commissioner declined to let his subordinate take up the offer from Rand, because of his fear that it was CIA-affiliated. That culture of suspicion needs to change; India needs to learn how other democracies fight terror.

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

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.

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.