Comment: I was taking basic computer courses in 1987. Our teacher told us about a research on a new technology that would allow nano-robots to be injected into the blood stream. These nano-robots, we were told, could be programmed and used, for example, to recognize and break down blockages in order to clear blood vessels, treat coronary disease, and prevent heart attacks. The technology was based on a discovery that allowed miniaturization of circuit boards by using laser beams to allign and freeze in place strings of light sensitive and conductive viruses. Within a year, the technology disappeared from public debate and we did not hear about it anymore. Most likely, it was classified (and taken over) by the military. Yes, the technology has been with us for a long time. Today, 36 years later, extensive progress in this research must have been made. Your tax dollars at work.