In China they have many mass killings done by knives.
On March 23, 2010, Zheng Minsheng (郑民生) [ 7 ] 41, murdered eight children with a knife in an elementary school in Nanping, [ 8 ] Fujian province.
April 2010 Leizhou, [ 11 ] Guangdong another knife-wielding man named Chen Kangbing, 33 (陈康炳) [ 12 ] at Hongfu Primary School wounded 16 students and a teacher
May 2010 An attacker named Wu Huanming (吴环明), 48, killed seven children and two adults and injured 11 other persons with a cleaver at a kindergarten in Hanzhong, Shaanxi on May 12, 2010
I could keep going but you get the point.
I propose the following on knife control.
Owning a knife should not be an automatic right. Every knife owner should have to pass a knife safety class, a background check and be licenced, with biometric functionality, so no one but you can ever use your licience. There will be a licence fee to cover the cost of this. Every knife should be licenced as well. All knives would be tracked from time of manufacture. All knives have a unique signature, microscopic imprints it leaves on every wound in the victim. All knives would be test stabbed at the factory and the markings entered into a database, so that if it is ever used in a crime it can be tracked back to the owner.
:)