Defectors warn of N Korea chemical threat

Video: N Korean defector speaks out

 

 
 Defector warns of N Korea chemical threat 
 

While much of the world’s attention has been on North Korea’s nuclear weapons programme, a defector is warning of a more imminent threat.

He says that Pyongyang has a sophisticated chemical and biological weapons programme – and that mentally disabled children are being used as human test subjects.

Al Jazeera’s Steve Chao reports.