CNN EarlyStart April 25, 2013 10:07:00
Tamerlan tsarnaev posted on his youtube channel. russian special forces killed abu dujan in a shootout last december in dagestan and we don't know if he ever met tsarnaev. but dagestani police revealed to cnn this small time militant ran training camps for bomb making but foreigners came, too. police gave us images of abu dujan's group training in the woods. this one show how to mix and prepare homemade explosives almost anywhere. and the group's pictures suggest they learned to use a mobile phone as a detonator. local police chief who helped hunt down abu dujan say the militant trained foreig...