Gun violence is an epidemic in this country. Over 117,000 Americans are shot every year, with 33,000 dying -- a rate that dwarfs every other industrialized nation. Adding insult to injury is the fact that we know so much of this pain is preventable. How do we know that? We've done the research. Each year, the legal experts at the Law Center to Prevent Gun Violence analyze the strength of gun laws in all 50 states and assign letter grades. Then we compare those grades to the states' gun death rates. Year after year, we've seen a powerful correlation: states with stronger laws have fewer gun deaths per capita while states with weaker laws have more gun deaths. And interstate gun trafficking has become a contagion -- states with the weakest laws are also the source of the most crime guns. Simply put, smart gun laws are saving lives. But to reach their full potential, those laws urgently need to be adopted nationwide.