Boston bombing suspects' mother: My sons are innocent, this is a set up (VIDEO)

RT speaks to the mother of accused Boston Marathon bombers, Zubeidat Tsarnaeva. The suspects are 19-year-old Dzhokhar Tsarnaev, who remains at large, and his brother, 26-year-old Tamerlan Tsarnayev, who was killed after a police car chase. Their family originates from Russia's North Caucasus - but settled in the United States more than a decade ago.