In Wired's next issue, and just up online: a fascinating feature by Steven Johnson on defense in the age of...

In Wired's next issue, and just up online: a fascinating feature by Steven Johnson on defense in the age of van-borne nukes. Johnson
whose book Emergence delved into the evolution of cities
argues for a barrier of radiation detectors around major cities, and explains how it would work.

We need to make sure that van stays 14 miles away from the Capitol. And the way to do this isn't with Star Wars technology
death rays beaming down from space. We need an older technology, as old as cities themselves. We're talking about a wall.

Stopping Loose Nukes [Wired Magazine]