I was at Maryland University just outside Washington DC, where Professor Challapa and his team are inventing the next generation of citizen surveillance. They had pushed back furniture in the conference room for me to walk back and forth and set up cameras to feed my individual data back to their laptops.
Gait DNA, for example, is creating an individual code for the way I walk. Their goal is to invent a system whereby a facial image can be matched to your gait, your height, your weight and other elements, so a computer will be able to identify instantly who you are.
Since 9/11, some of the best scientific minds in the defence industry have switched their concentration from tracking nuclear missiles to tracking individuals such as suicide bombers.