"People ask me what I'm proudest of and what are my biggest frustrations as President. My biggest frustration is that this society hasn't been willing to take some basic steps to keep guns out of the hands of people who can do damage. We're the only developed country where this happens. And it happens weekly. Our levels of gun violence are off the charts."
President Obama sharing the difficulties of trying to change a culture in which school shootings are commonplace. (source)