AND so, after nine years in hiding, a divorce, another marriage, a son, and two books, Salman Rus-hdie proclaimed himself 'free' as he left the Foreign Office in London last week. "It means everything, it means freedom," he said of Iran's announcement that he was not on their wanted list. "It looks like it's over." But it wasn't. Rushdie had come, and he left, under security. The threat is reduced, but around the words of jubilation, the police in Britain are still looking out for potential killers.