Well sometimes I read forums like ar15.com where lot´s of security officers post, and also some police forums in Spain (I got some police friends and I like commenting with them about these issues). I have noticed that in the USA the policemen´s state of mind is much more violent (more movie style) and "shoot first ask questions later" than in Europe. I think is logical under their point of view, because of the long campaign of fear and violence that´s been playing on the media. Also it´s true that american criminals are more likely to just draw a handgun and start a confrontation with police. Maybe this is due to the difference in prison sentence for the same crime. Here in Spain, most criminals just walk away after they spend a night in prison, and even a hard sentence for drugs or a kill will have great discounts that effectively make stays longer than 10 years in prison very rare. Also live inside jails is much more humane than in the States. Oppose that to the third strike rule, that will put you for live in jail even if the last offense is minor.(I don´t know if this law is still active)