reporter: unrepentant, uncaring, untouched by the sorrow he created how prosecutors described dzhokhar tsaranevn the opening statements for the penalty phase of the trial. they ended statements showing a picture of tsaranev giving the middle finger to a security camera in the holding cell at federal courthouse several months after the bombing. prosecutors told the jury he was destined to become america's worst nightmare. the jury found him guilty of deaths of krystle campbell, lindsay lou, and martin richard. each of the victims had time to feel pain, scared, frightened but no team to say good-bye. as they make their case for a death sentence. prosecutors called three bombing survivors to testify in this phase of the trial with krystle campbell's brother and her father. her father told jurors that his daughter hug him every single day and that that is what he misses most today. in boston, alexandra field, cnn. >>> twitter is stepping up the way it deals with online abus s abusers. ahead we will show you its new tactics against cyberbullies. >> plus wednesday marks the 45th anniversary of earth