They’re cowering in Chicago, where the NATO summit is scheduled to open on May 20: the security arrangements go well beyond paranoia. They’re telling office workers in buildings adjacent to the site to “dress down,” lest they become identified with the proceedings. A huge “security zone” is being imposed on McCormick Place, where the conclave will take place, and subway riders who must pass under the site will be subjected to pat-downs and other security measures. The airspace above the venue will be restricted, and any planes that pass through it will be promptly shot down.