1. GUN VOILENCE 制作者：陈思婷

2. Gun violenceGun violence is a regularly debated political issue in the United States. Gun-related violence is most common in poor urban areas and frequently associated with gang violence, often involving male juveniles or young adult males. [1][2] High-profile mass shootings have fueled debate over gun policies, even though these events are relatively rare Murders involving the use of handguns in the US that same year totaled 6,009, with another 1,939 murders with the firearm type unreported. [4] High-profile assassinations such as those of John F. Kennedy, Martin Luther King, and the Beltway sniper attacks involved the use of rifles, usually with telescopic sights, from concealed locations.United States [1][2]gun policies [4]John F. KennedyMartin Luther KingBeltway sniper attacks

4. http://www.langfly.com/mt/02/20120110095002.shtml

5. The reason of the United States shootings

6. The first reason -guns In America, there is no limitation for gun, so many people could touch the gun. Most Americans think about having a gun will make them more secure. The United States as the world's only private carry weapons as the constitutional rights of the country.

7. The second reason-violence Violence content flooded the American media. People contact the violence when they are kid. Young people like violence. The culture of violence make people think that shooting is the way to let out their anger.

8. The third reason-Psychological and personality Most of them are unsociable and eccentric. Most of them have problem of spirit. Family background and environment. Most of them are dissatisfied with their life. Quarrel with other always give rise to hate. For revenge.