In Britain in the 1970s and '80s, citics and towns began installing cameras to monitor treets and parks, public transportation, stadiums, and shopping areas. Now, with more than four million such cameras nationwide-that's one camera for every 15 people-Britain has more surveillance cameras than anywhere else in the world. British sociologist2 Clive Norris and his colleague Michael McCahill estimate that the average visitor to London is now caught on video 300 times in a single day. Having thoroughly studied surveillance trends in the United Kingdom, they have concluded that all Britons should assume that they are always being watched once they step outside their homes