well, jim davis, starting with you, how does boston change things for people in your position? what kinds of discussions are going on now? >> well, certainly we're much more focused on security. you know, in the united states we've got pretty short memories and i think after 9/11 we were very focused on security and then things kind of we'd go through a time period where we don't a lot of attacks or any sucessful attacks and now boston happens and people get focused on it again. i think that in the -- in law enforcement and intelligence community we've always been focused on it but people are going to be more receptive to security measures now and more focused on making sure that major events are safer. >> brown: ed cannon, explain how this works. take something you have worked on, perhaps the new york city marathon, for example. what kind of measures go into it? how much preparation? how much thinking and how might that change if a all now? >> well, jeff, the new york city marathon is going to be examined with lessons learned from what occurred last week in boston. think about

davis, reaches out some smacks the 0-2 pitch into the right field for the 9th home run of e year. now, with closer jimnson available the a's call on madison to protect the 2-1 lead in the 9th. wishing it would of stayed on the dl one more. 12 games this season. extra innings, letting off with a base hit. dropping the bunt. pedro throws it in center field. everybody is safe. next man up, cocoa crisp. drops a bunt. he tries to get the out at 3rd and throws it down-the-line. now, screaming at him to score and that, he does. he beats the throw home to score the winning run. avoiding the 4-game sweep. >> we go through that final play and what were you thinking? >> i knew it was going to be a close play at 3rd. i was going to do my best to beat it. so loud. i was trying to read the crowd to understand what was going on. if he caught it, safeor out. i looked up and he was waving me, looked back and saw the ball and thought i could make it and took off to home. >> he did not catch you off guard in the post game, did you? >> a little bit. [ laughter ] >> i figured it was coming but i did not know when. a good

i want to check with katie davis, who is with our nbc station out of hartford. katie, are you there? >> reporter: jim, hi. yes, we're here live along the marathon route. things still a bit chaotic here. at this point all of the injured people have been taken to hospitals nearby, but all the streets remain shut down as local police as well as federal investigators begin the investigation tonight. we have some video we want to show you of the moments just after the blast happened. terrifying for people running the marathon, spectators, anyone who was in the area at that time. again, two people killed. 23 others injured. many of those people with very serious injuries, amputation injuries. nbc news now hearing from multiple sources that those bombs contained shrapnel and that that is what led to so many of those serious injuries. back to you. >> that was katie davis reporting from boston. thank you, katie. we were getting some updated information about the number of injuries. we understand now 86 people are injured there at five different hospitals and we believe at least two of those are children. stil