I can't answer this on the site, but my boss claims that he was partially responsible for this. He worked with the company doing facial recognition software to

I can't answer this on the site, but my boss claims that he was partially responsible for this. He worked with the company doing facial recognition software to hunting down kiddie porn makers, which was (I think) moved into terrorism detection (this is in the 2001-2002 timeframe). They couldn't get the facial recognition to work with enough accuracy with anything but a blank facial expression.