First lesson: Don’t outsource your top secret type work.
According to the affidavit, investigators began probing the cell last January, when a video store worker contacted them after a customer brought a DVD to be duplicated. The DVD showed 10 young men “Shooting assault weapons at a firing range in a militia-like style while calling for jihad and shouting in Arabic ‘Allah Akbar’ (‘God is Great’).”
Also, DVD stands for “digital verstatile disc” , not “digital video disc”.
Not So Fast 