if you look at the first of the program you have very early, young vibrant mendelson; fabulous opener and then you have this fabulous concerto written for us in the orchestra. is our gift. msk(music) >> and then you have strauss, extraordinary piece. the most challenging of all. string orchestra work. 23 solo instrument, no violin section, now viola section; everybody is responsible for their part in this piece. the challenge is something that i felt not only that we could do , absolutely could do, but i wanted to show off. i can't tell you how aware i am of the audience. not only what i hear but their vibes, so strong. i have been doing this for a long time. i kind of make them feel what i want them to feel. there is nobody in that audience or anywhere that is not going to know that particular song by the fourth note. and that is our encore on tour. by the way. i am proud to play it, we are from san francisco. we are going to play that piece no matter where we are.track. >> ladies and gentlemen, please welcome laura republican powell jobs chair and co-founder of college track. >> tha

bruce mendelson who is an army veteran was on the scene and responded.a post-race party at 667 boylston street on the third floor of a building. the first explosion knocked me off a couch on to the ground. i was with my brother who had just finished the marathon. i yelled at him to get all the people back away from the windows. and -- >> and you went down. >> he got people to the back of the building. i ran downstairs and came out on to a sheet of glass shards. there were blood smears on the sidewalk there were a lot of people with grievous lower body injuries. >> what did you do? >> i rendered what assistance i could. i helped the boston pd establish a security cordon to make sure there would not be any other explosions. >> sounds like your training took over. >> i think i did what anybody else would do, wrong place, right time. >> reporter: how did it effect you seeing that? >> this is terrible. i mean, this is terrible. i'm upset. i mean, normally on marathon night this should be full with people and bars open and festive and it blew up in a second, i

bruce mendelson who is an army veteran was on the scene and responded. you were right at the finish line? >> i was in a post-race party at 667 boylston street on the third floor of a building. i was sitting on a couch. the first explosion knocked me off a couch on to the ground. i was with my brother who had just finished the marathon. i yelled at him to get all the people back away from the windows. and -- >> and you went down. >> he got people away from the windows and back of the building. i ran downstairs and came out on to a sheet of glass shards. there were blood smears on the sidewalk, there were people injured with a lot of grieve yus lower body injuries. >> what did you do? >> i tried to render what medical assistance i could. i tried to help the boston pd which was on the scene in force immediately, i tried to help them establish a security cordon so there wouldn't be any tertiary or other explosions. >> sounds like instincts took over, your training. >> i guess i could thank army for that. i guess i could what anybody else would do, wrong plac

. >> reporter: also at tufts medical center bruce mendelson, a bystander who ran toward the explosion was the first to reach victoria, used a t-shirt to tie a tourniquet to her leg. >> the doctor told me if you hadn't done that i would have died. you saved my life. otherwise i would have bled out because it hit the artery. >> wow. >> reporter: x-rays reveal a one-inch piece of shrapnel tore into victoria's leg. >> just a matter of centimeters, the difference between having a leg and losing it? >> yes. >> reporter: at first, one stranger who pitched in to help victoria remained a mystery man. >> his name is tyler. that's all we know. victoria very, very much wants to thank tyler personally. >> reporter: after that public plea tyler dodd came forward. >> i can stand up. >> no, you stay there. >> i can stand up. >> are you sure? >> yeah. >> reporter: tyler told victoria he survived a shrapnel injury in afghanistan, but that wasn't quite true. >> he wasn't a soldier in afghanistan. he wasn't in combat. >> reporter: this is the little white lie you embrace? >> yeah. i don't regret it. i do

his name is bruce mendelson. take a look at what he told me. >>> it happened here.pens in baghdad, it happens in barcelona, it happens in london. it happens everywhere. and we all have to be prepared for that, but not at the expense of things that make us proud and happy as a people. >> that's what he told us about that. here is the cover of the paper here, it says a grim hunt for answers. you see the people, the guys on the roof here in their hazmat suits. this is the roof of the building across from the finish line, possibly, possibly where they found the top to that pressure cooker. we're going to move on now and update you on more information. we're going to talk about the scraps found at the sight, they're being sent to the fbi laboratory, and they will try to reconstruct the bomb. we have susan candiotti here, what do you know? >> the photographs that we're now seeing are giving us a close up look at what investigators are looking at. some of the things they're retrieving from this very large blast field. and it is raising all kinds of questions. like the pers

. >> reporter: also at tufts medical center, bruce mendelson, a bystander who ran towards the explosion, not away. >> you are smaller than i remember. >> he was the first to reach victoria, used a t-shirt to tie a tourniquet to her leg. >> the doctor told me that if you hadn't have done that, i would have died. you save midlife. otherwise i would have bled out, because it hit the artery. >> wow. >> reporter: x-rays reveal a one-inch piece of schlep nehrap into victoria's leg. >> so a matter of centimeters. >> reporter: lisa sham bla was in a medical tent at the finish line when victoria was carried in. >> it's so good to see you. >> reporter: but the first to see her in that tent was tyler dodd. >> i can stand up. >> are you sure? >> yeah. >> reporter: in that tent, victoria was hysterical. >> just your voice, it's so calming. >> reporter: tyler then told her he had been hit by shrapnel in afghanistan. he promised she'd be okay. >> he wasn't a soldier in afghanistan, he wasn't in combat. >> reporter: so this is the little white lie that you embraced? >> yeah, i don't regret it. i don't

if you look at the first of the program you have very early, young vibrant mendelson; fabulous opener and then you have this fabulous concerto written for us in the orchestra. is our gift.