shot at the audience with multiple weapon, which caused the result of 12 people died, 70 others injured; On January 8th, 2011, a 22 years old young man assaulted the American senator Gabrielle Giffords and other 18 people with a pistol. As a result, six bystanders died including a girl only 9 years old; On April 16th, 2007, a student in Virginia took away 32 people’s life (including himself) with two pistols (Global Shooting). As can be seen, these are massacres happened within last 5 years, and obviously