From Col. Cooper's Commentaries in 1999:
Television commentator Tom Brokaw has recently offered a curious analysis of what may be called "generation diversity." In one instance, an elderly gentleman was complaining to a social scientist about the mindless vandalism of young people who take it upon themselves to smash property just for laughs. The latter was inclined to minimize the perniciousness involved as simply the normal exuberance of youth. The plaintiff was asked, "Well, what were you doing when you were 17?" The answer, "I was fighting on Guadalcanal."
Yes, Virginia, there is a generation gap.