Evidence suggest the Boston Bombers had teror training

[JimH52]

’13 Benghazis That Happened Under Bush’ Viral Meme Taken Apart & Destroyed Before Your Very Eyes

"The Marathon bombs were constructed using improvised fuses made from Christmas lights and improvised, remote-control detonators fashioned from model car parts," federal prosecutors said in a motion filed Wednesday. "These relatively sophisticated devices would have been difficult for the Tsarnaevs to fabricate successfully without training or assistance from others."

Where did they get the training and who else was involved?