Sure something could/should be done about guns here in the United States; make them not so accessible. There are far too many people here in the United States who have access to firearms who have no business being around firearms in the first place, and we are now witnessing the net results.
More extensive and intensive background checks need to be authorized and performed, to make sure that if the names of people with histories of substance/alcohol abuse, mental illness, anger-management issues, etc., appear on a gun-dealer's computer, that they don't get access to them.
More to the point, if our various lawmakers (from the President on down) had the gumption to stand up the the bullying tactics of the IRA and the Gun Lobby and pass stronger, more affective gun laws, we'd be way better off.
The United States' dependence upon and evolvement around firearms exists at an extremely heavy price; more deaths/maimings as a result of firearms--i. e. the highest per capita in the Western Hemisphere.