America has a long history of individual freedom and personal responsibility. Its westward expansion by rugged individuals and the romanticizing of its gun history strengthen its gun culture in America, especially in the West. That almost everything about American society has changed since the 1800s seems irrelevant to gun fanatics.
In 1999, the Columbine shooters killed 13 and wounded 24. Public outrage resulted in no major long-term gun control.
Five years later, America allowed the assault weapon ban to expire. Since Columbine, America has had 35 mass shootings, including seven in 2012 alone.