A Chinese policeman stands guard near a court in Hefei, Anhui province, in August 10, 2012. A man has stabbed 22 primary school students in a knife attack in China, officials said, the latest in a ... more 

A Chinese policeman stands guard near a court in Hefei, Anhui province, in August 10, 2012. A man has stabbed 22 primary school students in a knife attack in China, officials said, the latest in a series of assaults less