"When, for God's sake, are we going to confront the gun lobby?", said Joe Biden, saying too he was "sick and tired" of the blockage of part of theUS political class, which refuses to regulate gun sales. I used to talk about artificial intelligence &é the ethics that must be associated with it… AI is created by humans… like weapons… we're on the same subject! We need to obviously regulate AI algorithms so that they are not harmful to us humans… but apparently in the US that doesn't seem to be the case when we replace AI with weapons… catastrophic!! Just some evidence: 1/ Research on the subject across US is clear: the greater the number of firearms in circulation, the greater the increase in firearm violence. States with a large proportion of their population owning firearms have homicide rates that are 114% higher than those with a less armed population. A review of the scientific literature from Harvard University's Violence Prevention Research Center indicates that the availability of access to firearms is a well-established risk factor in numerous studies. Both men and women are at greater risk of being victims of firearm homicide in places where there are more guns.

In the United States, it seems we never have to go more than a few weeks without hearing about another mass shooting. With each new incident comes renewed calls to strengthen gun control laws, expand federal background checks, and get rid of assault rifles. Though the opposing faction promptly dismisses each appeal by citing 2nd Amendment rights, other discussions of practicality often emerge. Specifically, the efficacy of such laws is often called into question. How do we know which laws work and which ones don't?

Homicide mortality is a worldwide concern and has occupied the agenda of researchers and public managers. In Brazil, homicide is the third leading cause of death in the general population and the first in the 15-39 age group. In South America, Brazil has the third highest homicide mortality, behind Venezuela and Colombia. To measure the impacts of violence it is important to assess health systems and criminal justice, as well as other areas. In this paper, we analyze the spatial distribution of homicide mortality in the state of Goias, Center-West of Brazil, since the homicide rate increased from 24.5 per 100,000 in 2002 to 42.6 per 100,000 in 2014 in this location. Moreover, this state had the fifth position of homicides in Brazil in 2014. We considered socio-demographic variables for the state, performed analysis about correlation and employed three clustering algorithms: K-means, Density-based and Hierarchical. The results indicate the homicide rates are higher in cities neighbors of large urban centers, although these cities have the best socioeconomic indicators.