Lunatic + Semi-automatic = Mass murder, any questions?

We can’t eliminate mental illness or pinpoint when someone will become completely unhinged, but we can put the brakes on semi-automatics.How many times is it going to have to happen before there are restrictions placed on semi-automatics? Columbine, Loughner, Auroroa, all fit the same pattern.

Is there any justification for owning a semi-automatic? How often are people attacked by armed militias in the U.S.?

As long as these weapons are legal, there is no way of tracking them. If they were illegal, there would at least be the possibility of monitoring their purchase so buyers and sellers could be arrested before the guns were actually used.