The dorky wheels that must be never be revealed:
We were just outside Boston, Massachusetts at the Raytheon world headquarters. Raytheon, a big producer of hi tech military weapons and air traffic control systems, was working on the PRT (Personal Rapid Transit) project. Several energetic images were needed to promote the new system worldwide, with instructions that we were not to reveal the rubber tires under the vehicle in any of the final photos.
In a recent BBC puff-piece about ULTra, we get a glimpse of the undercarriage of the glorified golf cart... and its dorky wheels: