Twenty years does not wash away memory. The best it can do is impose a patina that blurs horror, making those things we would rather forget more acceptable, allowing us to look at the past with a more dispassionate eye. The passage of time creates its own objectivity, and we can view events in the light of cause and effect. At the time I hated Falconi with an intensity bordering on the murderous, but even that had dulled with the years, until in a...