exhausting trial full of dramatic testimony and images of a horrific attack. joining me from portland maine, boston bombing survivor karen mcwaters. lovely to have you on. >> thank you. >> before we talk about him, i want to talk about you. and i want to talk about krystle campbell who lost her life that day. if you can, take me back to those moments on boylston street in april of 2013. >> yeah it just happened so fast. we went there to watch kevin run. we were trying to get a good spot to take a picture when the first bomb went off. that's where we were standing. like you said it happened so fast. one minute i was looking at my cell phone. the next i was on the ground. >> and i understand you held krystle's hand in those final moments. >> yes, i tried to find her.