People are no more fearful of crossing a street with a young male skinhead in it than they are a street with a smartly dressed woman present, unless, that is, a CCTV camera is overhead. The new finding appears to undermine one of the key justifications for Britain's network of 4.2 million surveillance cameras: that they provide reassurance to the public. It seems that the sight of a CCTV camera can have the opposite effect, cueing the perception of a threat. Dave Williams and Jobuda Ahmed presen