The capture of Dzhokhar Tsarnaev last week ended Boston 's nightmare . Yet , investigators must answer `` a million questions '' And even if the suspected Boston bombers were not connected to a terrorist organization , the brothers may have had help . There is still no clear motive for last week 's bombings . Why did the brothers choose to attack?
The capture of Dzhokhar Tsarnaev last week ended Boston 's nightmare . Yet , investigators must answer `` a million questions '' There is still no clear motive for last week 's bombings . Why did the brothers choose to attack?