Don't forget "Gait DNA"[0] for tracking your movement through a crowd, even when your face can't be seen. [0] http://news.bbc.co.uk/1/hi/programmes/from_our_ow

Don't forget "Gait DNA"[0] for tracking your movement through a crowd, even when your face can't be seen. [0] http://news.bbc.co.uk/1/hi/programmes/from_our_own_correspondent/6995061.stm http://news.bbc.co.uk/1/hi/programmes/from_our_own_correspon...