Bang, bang.

Birmingham have put in place a system of sensors around certain parts of the city which can "hear" gunshots and by triangulation pinpoint with reasonable accuracy where they came from.  I'm not sure that I find this particularly reassuring - it seems to me to be accepting that the war against gun crime is as good as lost, and the best the police can do is deal with the aftermath.  Certainly better than nothing and it may well result in more offenders being caught, and faster response by the emergency services, but surely we should be putting our efforts into preventing guns from being discharged in the first place?