More Policing Does Matter – Recent Findings from Objective Empirical Research
"the focus of this discussion has been on crime rates and policing. Our view is that with the right leadership and direction, each additional officer we deploy will reduce crime."
Over a dozen studies/references addressed in that.
That doesnt mean we let the dice roll where terrorism and crime is concerned.
We do the best we can because ....well the alternative sucks even more..
If you dont believe cop presence makes a difference punch someone in the head in front of one and see what happens.
You dont even have to do anything but be a jerk and get arrrested in the DC area.