he's reporting tonight from accra in nearby ghana. so i think the question on most americans' minds is why haven't we found these girls and why are we hearing about more kidnappings throughout the year by boca what ram? >> the short answer is boko haram is doing something very much like winning in the northeast of nigeria. the girls, there are 276 at first, and now it's down to 219 after a number of them escaped. and that's just a small segment of the total number of people boca hararksam has kidnapped. they control a large section of eastern nigeria, including mountains, caves forests small towns, even small cities at this point. it's a hard thing to find individual scirlz girls who have all been split up at this point. in may the u.s. sent drones and manned surveillance flights, and they did spot large groups of girls twice in june and july. they have no idea if those are the girls or if those are a separate group of girls that boko haridiculousam kidnapped. they did find large groups of girls. they sent the drones elsewhere where t

any thing in the experience of the so-called accra level of natural radiation increases the risk that we more or less evolve to live with. so a concern now are these man-made sources that go above and beyond our natural exposures. >> host: suki on a daily basis walk us through how people are experiencing radiation. >> guest: most of us encounter radiation at the dentist office or at the doctor's office for run-of-the-mill imagery. i am talking of course about getting her teeth fixed or getting a chest x-ray. if we have more serious problems vicious and married forms of medical imaging now that depend on ionizing radiation. that's a kindness radiation that can actually damage ourselves. there is also the radiation. we use what occurs other forms that occur in things like cell phones or microwave ovens or event radio tv broadcast. we use the term radiation for those signals. those forms of energy are not powerful enough to damage ourselves. ionizing radiation and x-ray machine definitely is capable of harming ourselves and that is what we have to be careful about. >> host: flying an air

what do you think accra >> is this one of the important issues facing our society today?every time you come in the show, we do some important issues and some humanizing. >> the koch brothers and infrastructure. count me in as a strong tom brady fan. i think he is a great quarterback, and i think he will do well sunday. i think new england will win. >> senator, let's close and talk a little bit about where you stand in your deliberations about if should run for president. what have you heard lately that encourages you that it would be a good idea for you to run? >> we got a lot of support. we have thousands of people who have contacted us who want to participate in the campaign. when we go to iowa, really good turnout. really good support. >> any specific conversations you've had lately that have encouraged you? >> a lot of conversations that have encouraged me. but what discourages me is just the issue you talked about. taking on people who have unlimited sums of money, and when you are prepared to run against the billion or class and the koch brothers and wall street, ca