This is a snap showing the famous Promenade des anglais, a pedestrian area in the Southern French city of Nice that was sadly the place of a terror attack in 2016. As you can see, the Promenade is today fully protected with barriers that keep out unwanted vehicles.
I find it fascinating: the medieval villages and cities erected walls to keep bad things at bay – today, centuries later, we do the same! And centuries from now? Well, the Enterprise does have its shields!