arizona armedforces attitudes australia barack business canada concealedcarryoffirearms constitutional dangerouslymentallyill designandconstruction economics emilyj firearms firearmsandcrime firearmsindustryandtrade firearmsowners general genocide gesetzgebung governmentpolicy guncontrol gunshotwounds history infrastructure intergovernmentalcooperation jurisprudence juveniledelinquents juvenileliterature kontrolle law law018000his027080 lawandlegislation lawreform legislation massmurder mentaldisorders mentallyillpersons methods military miller philosophy police politicalandsocialviewsobama politicalaspects portraitphotography portraits prevention protestmovements psychology publicopinion research revolutionaryperiod(1775-1800) riskassessment schoolshootings soc026000soc026030soc051000 socialaspects socialhistory socialscience socialsciences sociology statistics suicide three-dimensionalprinting tucson unitedstates urban vigilantes violence violenceinsociety violentcrimes waffenbesitz weapons women youthandviolence