Today marks one year since the deadly Boston Marathon Bombings. Three-people were killed and more than 260 injured when two bombs went off near the finish line. Investigators say 20-year-old Dzhokhar Tsarnaev and his brother 26-year-old Tamerlan Tsarnaev were the bombers. The 20-year-old is currently in a secure federal medical facility, awaiting trial in November. The elder brother died. Tamerlan was killed when his brother ran over him with a car after a shootout with police. This year's race will be held Monday, April 21st.