marathon yesterday in boston. survivor rebecca gregory, shown right there lost part of her leg, running part of her race and hitting the finish line there. molly line at the courthouse in boston. what happens today molly? let's start inside. good morning. >> reporter: food aregood morning bill. the same jury that convicted dzhokhar tsarnaev will be the one to decide whether or not he lives or dies. things have yet to get started this morning. we have yet to hear opening statements or the judge's instructions but throughout the proceedings it will look a lot like a trial in the second phase. the defense will present mitigating factors the reasons jury should send tsarnaev to life behind bars. defense attorneys argue that tamerlan was domineering older sibling. the prosecutors will argue aggravating factors, conspiracy, murderer after police officer while on duty.