““The modern FBI was born, a little less than a hundred years ago in practical terms, in response to the great vector change of the early 20th century—when the confluence of asphalt and the automobile introduced a kind of crime that no one had ever seen before. You always had robberies, but now they were coming in a vector that was unimagined in its scope and in its speed. John Dillinger could do robberies in two states in the same day, moving at 55 miles an hour downhill. All of a sudden, county lines were very meaningful and state lines were meaningful, and this vector change thwarted law enforcement. And so what was needed was a national force to span those boundaries and respond to that threat—and the modern FBI was born.””