joining us "today" is lieutenant general michael barbero. >> thank you, vago. >> welcome back. we talked to you when you were in iraq a couple of years ago. >> we did. >> tell us about how the ied threat has been evolving and what is the major type of threat that troops are facing today. >> well, the basic ied is comprised of five elements. you have a switch, and we have several here i'll speak to in a minute, a power source to complete the circuit and initiator to start the debtonnation and the explosive itself. for switches, what we've seen and continue to see are several types. the first one is command wire. there's someone sitting at the end of this wire and they stretch it out, it could go for about 100 meters. at the end of it is an ied and at the time of the choice they initiate the ied. >> push the button and an electric circuit and you've got a detonator? >> what we saw a lot of in iraq is the radio-controlled ied. very simple cell phone, key fab, improvised device. and easily hidden, but all they have to do there is press a button and it completes a circuit and initia

will start out of the one -- >> a trainer in fair hills maryland by the fame of michael matz had this horse called barbero -- does he have a horse? >> yes, he does. 20-1 on the morning line -- . >> i understand they ran a race a couple of weeks ago, kentucky derby. >> >> i'll have another. >> >> reporter: what is he going off as? >> second choice of the morning. after the betting yesterday, second choice, 7-2 if you get 7- 2 with a derby winner, you had better go to the window. >> reporter: a couple of years ago, they made a decision to chain the infield from a party to a much more structured event and by all accounts, it seems to be working. >> the first year, we were boycotted, but we took a step back to go two forward and it was better in 2010. better last year and it will be better this year. >> reporter: how many people do we expect to come through the gates? >> i talked to my boss last week, he expected 112,000. >> so, you can still walk up and get in? >> we don't have a lot of tickets in the building, but if you want to come in the infield and get maroon 5 or little big town or probeach volleyball,