Boston Marathon Bombers | Why They Did It

The Boston Marathon bombing was a domestic terrorist attack that took place during the annual Boston Marathon on April 15, 2013.
Two bombs went off near the finish line, killing three spectators and wounding more than 260 people. 17 of the wounded lost limbs, fueling efforts to improve amputations and artificial limbs.
The two homemade bombs were made by the two brothers, Tamerlan and Dzhokhar Tsarnaev. Why did they do it? They went from hopeful immigrants to mass murders. Why?
This documentary takes an in-depth look at their background, upbringing, and circumstances that reveal clues about the bombing.