Two, other good points from John Hawkins:

“* Adam Lanza didn’t acquire his guns through any sort of “gun show loophole” that needs to be closed. He got his weapons by murdering his mother and taking her legal weaponry.
* Sandy Hook Elementary was already a “gun free zone,” but unsurprisingly, a man bent on mass murder ignored that law.”

via Which Gun Control Law Would Have Prevented the Sandy Hook Tragedy? | Right Wing News.