Not just America, it isn't an American problem, it is a human condition problem:
A knife-wielding man injured 22 children and one adult outside a primary school in central China as students were arriving for classes, police say, the latest in a series of attacks at Chinese schools and kindergartens.
The attack in the Henan province village of Chengping happened shortly before 8am local time on Friday, said a police officer from Guangshan county, where the village is located.
Min Yingjun, a 36-year-old villager, was taken into police custody, said the officer, who declined to give her name, as is customary among Chinese civil servants.
http://www.guardian.co.uk/world/2012...primary-school