Nothing. He volunteered, and he didn't want to see you die for something like this. For doing something that keeps a lot of people from dying in a horrible way. He offered to stop that, so...I did.

And you know why I didn't offer myself. I have a family too, and I'm not going to force them to live without me. I...I couldn't force them to lose me.

[It's selfish, and he knows it...but he can't change it. He didn't want to see a kid dying for their family, and he didn't want to die for something he didn't do. And it seems like most everyone else agreed.]