All those people screaming that's illegal is totally backing up this guys point. He has a knife in a classroom and literally no one is doing anything about it..Making firearms illegal won't stop someone shooting up a school if they are so intent on doing so. Guns including semi autos are available in every country on the planet whether it is illegal or not..The only way to counter this problem, and a statistically minute problem at that, is to have a good guy with a gun like they do at jewelry stores, banks and every other place where apparently money is worth physically protecting more than children.