"Data from cameras will be purged every 30 days" ... "the NYPD can not only track a suspect’s car in the city, but also determine where the vehicle might have b

"Data from cameras will be purged every 30 days" ... "the NYPD can not only track a suspect’s car in the city, but also determine where the vehicle might have been the preceding days, weeks and even months" So, which is it? Also, radiation detectors?! Surely they've just been thrown in as a bit of a joke/toy. Gun shot detectors would perhaps be a more sensible addition. Putting the privacy considerations aside there's a lot of potential utility in systems like this. Robust person recognition and tracking from camera to camera could be really useful.