How gun violence in the US casts other nations in stark relief

It can be useful to view the tragic violence in San Bernardino through the lens of other countries. Mexico has just one legal gun shop and strict gun laws. But the country is awash in guns and assault rifles, like those used in the San Bernardino shootings. And South Africa sees more than its fair share of gun violence with rampant crime in cities like Cape Town, but mass shootings are foreign.