I knew that I’d lived in New York too long when, a few years ago, I was on a subway going downtown, and it stopped at 14th Street. At the station, the doors opened, and the conductor announced that there was a bomb on board and we should evacuate immediately. Nobody moved. We just looked at each other, ‘Do you see a bomb?’ ‘I don’t see a bomb.’ ‘There’s no bomb.’ ‘I’ve only got two stops – let’s go for it.