What is a police dept to do, when the crimes are escalating? Its simple to chide Warren County (or whoever); but who are you to say the next bombing or public rage will not occur there? The others were in similar places; no place is safe.
I mean, there was that one bank robbery in LA where the perps had serious body armor and heavy rifles in the 90s. Other than that I'm really drawing a blank for how often this would be appropriate tactically.
http://www.pewsocialtrends.org/2013/05/07/gun-homicide-rate-...
Yes, America is safer primarily (presumptively) because it banned lead-containing antiknock molecules in gasoline and banned lead-containing pigments in paint. The dispersion of remaining lead contamination out of the urban environment over the years so closely tracks the drop in violence that it almost makes one believe the correlation is due to causation. Almost. Unfortunately, experimental confirmation would be grossly unethical.