I came from a city renowned for its processions, but I had seen nothing like it. On the morning of June 18, 1982, on a sweltering summer day, I saw New York City come to a complete standstill. In the days preceding the 18th, various figures had been bandied about, huge, fantastical, for a rally in the US—100,000, 150,000, a man even went so far as to predict that up to 250,000 people would turn up and everyone told him this was America and to get off the hallucinogenic drugs.