[TheHayleyDoll]

^ Exactly. Tighter background checks IS a form of gun control. If the people behind the guns are the dangerous ones, why let them get guns in the first place?

Millions of checks are done every year, but just a small fraction, between 1 and 2 percent, turn up a problem. In 2009, the latest data available, only about 150,000, or 1.4 percent, of the 10.8 million applications to purchase firearms through a federal dealer were denied, according to a study published last October by the Justice Department’s Bureau of Justice Statistics. LINK - Badly flawed background check system fails to contain firearms sales | The Center for Public Integrity

This link actually references another mass shooting, Virginia Tech. The shooter had been committed into a psychiatric hospital, but records were not found because the background check system is flawed. He walked into a gun shop and bought a semi-automatic rifle (AK-47) and a pistol.

Of those denials, many people appeal and win back their rights to guns using the Second Amendment as their defense.

Sure, mentally unstable people can use other weapons, but there is nothing else capable of the damage a gun can make. It would be very difficult to commit any mass murder with a knife. Guns are fast, and long range. Knives are not.