Fun fact: If Lanza had not used a gun, if he had used, say, a machete or heavy blunt object, twenty-six people would not be dead right now. You can outrun a machete. You can't beat a door down with a baseball bat. Explosives are tricky to make and transport. The quantities needed to destroy an entire building would have been noticed by mom way before you killed her. Plus, you only get to blow yourself up once.
So all this bullshit about how determined killers will just find another means of killing? Do we really need to compare body counts? Fuck off.