and then dr. khan and his colleagues and the nurse along with others at the kenema hospital ended up collecting blood. they collected blood from discarded blood tubes that were going to be incinerated in a biohazard incinerator at the hospital. the reason for doing this is it's considered to be highly unethical to take samples from a patient in a clinical setting for research. that's an anathema to clinicians and to researchers. so, essentially, what they had to do was they had to gather the rna, the code of ebola virus from medical waste. they brought these samples over to the broad institute, and i don't know how many of you are familiar with genome she intentioning and how it works. i knew nothing about it before i went there and interviewed people. but steven gire, who is the genome guy there, steven gire's an interesting fellow. he originally -- he's, apparently, a very talented chef, and he was offered a chance to compete on the bravo show "top chef," and he turned it down and instead went to afr

this is what dr. khan did and i am sure in times to come they will have statues to him for those that died. but what we have here is medical people who sacrificed their lives and patience and those for science itself and when the sebetti paper was published five of the authors were deceased all who had died with the ebola outbreak and one of them was dr. khan. i have more but we're running short on time. i thought it would be wonderful to open the room to questions. . . in africa, including an american, stephen nacht for this. my question is i gather one or two people have survived in america unknowing american medicine as they do, they have all the bells and whistles. they've got a lot of transfusions. however, one of the people of the photographs, and "the new york times," i got african-american survivor, a survivor of a bullet, do some people because they are unique, whatever they've got genetically, do some people just make it through the type they have? are all the bells and whistles absolutely necess

both dr. khan and dr. salia knew the risks they faced. and tonight on news4 at 6:00, we will hear and see video that dr. salia made as recently as april when he talked about his mission as being his true calling. that's the latest live in lanham, maryland. chris gordon, news4. >>> more people traveling from west africa will have to monitor for potential ebola symptoms. airports are now screening people coming from mali. homeland security officials tell us there are no direct flights from mali. about 15 to 20 people come from mali each day. the move comes after a number of confirmed cases in that country. >>> there are some very big differences between the two deadly american ebola cases compared to survivors. in our next half hour, we continue with doreen gentzler, who will explain what went wrong this time. >>> and new at 5:00, a call for prayers from the parents of the latest american beheaded by isis militants. we streamed live coverage of the press conference from abdul kassig's parents on nbcwashington.com. th their son's life was pr

experts became aware of the fact that the zmapp drug was there in the freezer 25 feet away from dr. khan. they debated for three days whether to give him the drug or not. the considerations were you know, were very difficult to work their way through. this was an experimental drug. he was an african doctor. he was a national hero. if he was given the drug and he died, then he would be an african doctor who had been killed by an experimental drug administered by doctors from the developed world. the drug might have no effect on him but if he died it would be blamed on the drug. on the other hand the drug might save his life and then it would be well if he got the drug, why can't anybody else have the drug? and they went back and forth and back and forth and meanwhile dr. kohn didn't seem to be that sick. he seemed to be hanging in there and so there was hope that he would at least, that he had a good chance of just coming through naturally. now the thing about ebola is that patients can often look like they are doing all right but then you can suddenly go into what some ebola experts call