Continued violence in Ferguson, Mo., brings back memories of the urban riots of the 1960s.
As it happens, I had a front-row seat back then, as an intern in the office of Detroit Mayor Jerome Cavanagh during the six-day riot in July 1967. At one point I was alone in the so-called command center with Cavanagh and Michigan Gov. George Romney.
Many Americans seem to have an urge to...