It's April 15, 2013. Families, friends and bystanders are crowded on the sidewalks as athletes are nearing the finish line at the 117th annual Boston Marathon. What they don't know is that Dzhokhar and Temerlan TSARNAEV, two brothers originating from Chechnya, are standing at a distance waiting for their homemade pressure cooker bombs to go off and rip through the masses. At 2:49 pm, they did just that, killing three people and injuring hundreds. During an unprecedented manhunt, the brothers kill an MIT Police Officer, kidnap and carjack a man and get into an intense shootout with police where hundreds of rounds are fired.