It won't be over for the victims and their families for a long, long time.
Now that these two young terrorists have been dispensed with--one dead and one who will have to work his dreary way through our justice system--the FBI and all the other letter-heavy agencies in our government owe us the bad guys behind these two evil-doers.
The elder brother, Tamerlan Tsarnaev, said on social media that the main thing(s) in life were "career and money," which suggests the very likely possibility he did this for the latter. Follow the money and it will lead us to those who ordered this, and those who ordered this must also face justice.