It's so terribly sad.
We can't see this as a one-pronged issue, surely. As a country (not limited specifically to this situation) there are many issues at play.
In part, it's about too-easy access to dangerous weapons. And I mean many things by access, both personal and institutional: people not locking up their guns at home; lack of background checks at gun shows; lack of parental supervision of firearms; no training or licensing required. (Let's make sure it's a
well-regulated militia; there should be extensive training required for a gun license, much as there is a car license, and those found with a gun without a license should face very serious penalties.)
In part, it's about socio-economic problems and the dearth of decent jobs in so many areas of our country. I used to live in a town where a quarter of the town was employed in three factories. When the factories shut down, the unemployment rate hit 70% in that neighborhood and the number of murders quadrupled in five years. Desperate people turn to desperate measures; that's the way it's always been.
In part, it's about lack of funding for mental health care in this country. This is a societal problem and it deserves a societal solution. It might take more spending, which might mean more taxes; I think we're all better for it.
In part, it's about borders. Jenna, you're right that there are far too many gun deaths in Chicago, despite the gun laws. However, part of the problem is that you don't have to drive particularly far, nor over any kind of enforceable border, to buy a gun. More than a quarter of guns are bought just outside the city limits. It's unreasonable to expect a city's gun laws to work when one only has to drive five miles to buy a gun perfectly legally. (For more, see
http://www.nytimes.com/2013/01/30/us/strict-chicago-gun-laws-cant-stem-fatal-shots.html?_r=0)
It's also about culture. And I'm not talking here about (or only about) music or video games, but also about a culture in which gun violence is more or less accepted. This was barely a news story yesterday. If there was a school shooting like this in the UK (i.e. only the gunman was killed), it would be the top news story for a week. In many other countries, faced with mass shootings, the country responded with restrictions and gun crime plummeted. (For example, take Australia, which also had a long tradition of a cowboy culture; following shootings in 1996, serious restrictions were put into place, which dropped gun-related deaths by 47% and almost three times fewer guns are stolen per year.) Would it be the same in America? Probably not entirely. But part of fixing the culture of guns is making gun deaths not a regrettable accident but entirely unacceptable.