Last April, New York published the first of what we hoped would be a recurring event: an anniversary issue (the magazine debuted on April 8, 1968) that celebrated our birthday by exploring a slice of this city's history. In the 2011 edition, we traced the evolution of the New York apartment. That seemed to work out all right, so now we're doing it again. The subject this time around: scandals. Which are just as associated with New York City, when one stops to think of it, as the railroad flat or the classic six.