Commentary
PHILADELPHIA—It is just about 7:30 on a Thursday evening. Near Independence Hall, the cars ahead of me stop at a red light. As the traffic signal turns green and the vehicles start moving forward, a gang of young men on dirt bikes and motorcyclists tears through the red light and straight into the direction of the intersection of oncoming vehicles. Some of them encircle the cars trapped in the intersection. Some simply do wheelies. It lasts less than a minute.