they inactivate in the bsl-3 and move to the bsl-2. that work has all stopped at this point until we can ensure we're doing it safely. this is one of the things that really is a tipping point for improving the culture of safety at cdc. >> one of the more disturbing findings of cdc's own report on this incident is that scientists use a pathogenic strain of anthrax when they could have used a nonpathogenic strain, isn't that correct? >> yes, that is. >> when the moratorium is lifted and the brrat lab is opened, will you have clearer standards and protocols to make sure scientists are not unnecessarily using potentially dangerous strains of bacteria when it's not necessary? >> yes. >> gao and aphis both conducted investigations of the brrat laboratory following the june anthrax exposure. dr. kingsbury and dr. dick, you believe the moratorium and lab closure an appropriate response to this incident, don't you? >> yes, i do. >> okay. we should not forget today that the reason cdc conducts their special agent research is to help keep america

and they have been brought into a bsl-4, a bio safety level four facility, with all of the utmost care. it would be unusual that something in this setting is propagating out into the rest of the community. >> doctor, thank you very much for that. >>> straight ahead, four weeks into the conflict, and the death toll is still growing in the middle east. the latest developments from the region. and later, ebola fears loom over the big africa summit in the nation's capital. why the president is intent on forging ahead with that meeting. it's got a lot to do with another world super power. first, former presidential assistant and white house press secretary james brady has died after battling a series of health issues. brady was critically shot during the 1981 assassination attempt on president reagan, leaving him partially paralyzed for the rest of his life. jim and his wife sarah founded the brady campaign to prevent gun violence. the 1993 brady law enacted the first gun buy background checks. he received the nation's highest civilian award in 1996, the presidential medal of freedom. the w