Making Sense of it all! Police say when he carried out the massacre at the elementary school, Adam Lanza was armed with a semi-automatic assault rifle and two pistols. All the weapons were legally purchased by his mother. The president says something must be done about gun violence, but what? Also, Gibson thinks we need to look more into mental health in this country and not weigh all of this tragedy on gun control. John will be joined by Dr. Keith Ablow and Pro Gun Advocate John Lott.