Another mass shooting, another US gun control debate

A woman and her child at a 2013 gun rights rally in Utah

A mass shooting that left 19 schoolchildren dead in the deeply pro-gun state of Texas on Tuesday increased pressure on US politicians to take action over the ubiquity of firearms -- but also brought the grim expectation of little or no change.

- More guns, more shootings - Yet data shows the grim national cost of gun crime.

Originally published as Another mass shooting, another US gun control debate