But its far too early for me to say anything about that at this point while were still learning information about what exactly happened. And we are still learning about exactly what happened, but the other fact of the matter is that were just months away from turning over control of security in afghanistan to those afghan forces. I dont think anybody was under the illusion throughout this period when the decision was made to withdraw most of the u. S. Troops that it would not be fraught, that there would not be problems along the way, but without a doubt what happened today will raise some concerns. There is an ongoing investigation, and they will take a look at those protocols and see if theres any way to improve them to reduce the risk of this happening again, krystal. All right, chris jansing. Thank you so much for that update. And more breaking news now on the ebola emergency. The second american ebola patient is now being treated at Emory University hospital in atlanta. Nancy writebol arrived at emory just about three hours ago. Shes in serious but stable condition after the flight from liberia. Fellow patient dr. Kent brantly is also being treated there. Emorys special Isolation Unit is designed to filter and contain the air. Lab tests are done right there on the scene, and any contaminated materials are cleaned of the virus and then they are incinerated. The cdc is now testing a woman in columbus, ohio, for possible ebola while here in new York Health Officials say a man being tested for ebola is unlikely to have that deadly virus. But they are still pushing ahead with an abundance of caution. Doctors are also testing a possible patient in saudi arabia. Another is under watch in the u. K. All four patients were recently in these west african nations. The cdc says those tests take about two days for conclusive results. More than 1600 are now infected in four countries. The latest are in nigeria, which now has eight suspected cases, two confirmed. They all were in contact with liberianamerican patrick sawyer, who died from ebola just last month. He flied from liberia to nigeria, showing his first symptoms on the flight, exposing a possible 30,000 people en route. British airways has suspended all flights to and from liberia and sierra leone until the end of the month. Those two nations are the outbreak epicenter. Hundreds of troops there are trying to quarantine entire communities to try to stop the spread. Reports show that those quarantines have been extremely lax with people coming and going freely. The African Development bank and world bank are sending 260 million in aid to try to help out. And now usa i. D. Is deploying a Disaster AssistanceResponse Team to coordinate u. S. Response there in west africa as well as 7 million in assistance. Nbcs sarah dallof is back again for us outside atlantas Emory University hospital. Whats the latest . Well, good afternoon, krystal. Nancy writebol arrived here just after 1 00. Unlike dr. Kent brantly, she was wheeled inside on a stretcher. She reportedly is very weak, but she is showing some positive signs. On the ground in africa, she was able to walk from her transportation on to that airplane with assistance. Were also told that her appetite is returning. She had some yogurt before takeoff. Now, her husband who has been with her in africa, is reportedly going to follow in her footsteps in just a few days. Her sons are in the u. S. , and they are awaiting eagerly a reunion with her. The family spoke to the Aid Organization s. I. M. , the organization writebol is associated with, about this roller coaster of emotion theyve been on. A week ago, he said, we were thinking about a possible funeral arrangement. Yet, we kept our faith. Now we have a real reason to be hopeful. On to the other patient, that first patient, dr. Kent brantly, his wife releases a Statement Today saying he shows continued improvement and thanks the staff here for their continued excellent medical care. The writebol and brantly families met last night for the first time. The writebols thanking the brantlys for their continued prayers that nancy would arrive here safely. Prayers that today were answered. Thank you so much for that report. Lets bring in the Deputy Director of the Cdcs National Center for emerging and infe infectious diseases. Thank you for being with us. Yesterday we spoke about what we were calling an experimental serum that both dr. Brantly and Nancy Writebol received and showed some improvement. We know today thats called zmapp. Could you tell us more about this drug and if it really is the hope that scientists think that it may be . I must say what i know about zmapp is what ive been able to read in the published scientific literature. So any recent developments on the product would have to have come directly from the company. But it is a mixture of antibodies directed against the ebola virus that have shown promise in Animal Studies in limiting the spread of the virus in animals. Unfortunately, it hasnt been tested yet in human clinical trials. So its not yet licensed by the food and drug administration. Doctor, how long does that process normally take . With i really cant comment on this. I mean, thats something that the fda addresses. But part of the problem is the low number of cases that would be target for treatment. You know, as we watch this all play out, its all too reminiscent of a movie. I remember watching outbreak when i was like 10 years old and thought, theres no way this could ever actually happen. Or the movie contagion, which i was too afraid to see. The writer of that movie said the pandemic isnt the ebola itself, its the fear behind it. He wrote, on the heels of 9 11, five deadly cases of anthrax shut down the government, yet when 200,000 died from last years influenza, less than 37 of the population opted for a flu shot. So doctor, why do we do this to ourselves . Why do we make it worse by instilling fear in ourselves . Well, youre right. Just the word ebola does strike fear in people because of some of the movies, the way its been portrayed. To be frank, it is a serious disease with mortality rates that vary between 60 and 80 . So it is a serious infection. But the reality is, as was pointed out, that transmission of this virus is only through direct contact, either with an infected person or with their body fluids. Blood, urine secretions. So just casual contact or passing through an airport or passing through even an Emergency Department where a patient is, is not sufficient to cause infection. Or even on a plane for a number of hours. It still cant pass any other way than fluids. Thats right. If a person doesnt have direct contact with the person or with their body fluids, theres essentially no risk of infection. Right. Doctor, that direct transmission is what youre talking about. Yet, some of the precautions have gone further. In africa, theyve got several proposals and policies of trying to quarantine this. The New York Times reporting today that while the policies are right, the enforcement is lax. What can you tell us about that . We know how to control these outbreaks of ebola. Thats active case identification. Thats finding the people who are infected, getting them into one of these isolation and Treatment Facilities so they can be cared for, and then importantly identifying all of their contacts. That is, people who did have direct contact with the person or with their body fluids during the time they were potentially infectious so we can monitor them for 21 days to see if they develop symptoms so we can get them into isolation if they also develop symptoms. Quarantined can be use to restrict the movement of people, but its not really the most effective way to prevent the chain of transmission. Doctor, you talk about we know how to control this thing, but in this situation, folks are saying that the difference was not some different strain of the virus. It was that the International Community did not react quickly enough, did not react in the proper way. Some folks are saying the reaction that we had was like trying to change a tire in a hurricane. Thats how slow we were and behind the ball we were. What should we have done differently since we know how to control the ebola virus . So the analogy i like to use is a forest fire. When the initial event where the virus is transmitted from an animal to a human would be like the Lightning Strike in the forest. That might start a relatively small fire. In this case, that small fire went undetected for a long period of time because it wasnt expected. It had never been seen in this part of africa. It had only been seen in central africa. Even though few initial cases where people were dying and there was serious illness, recognizing this occurred in a relatively remote location in guinea, it was unrecognized that this was ebola. That let the fire start to spread from person to person and develop into a larger fire. And then the initial efforts to contain that fire, we thought we had done a pretty good job of containing it, but there were a few of these villages where people were reluctant to come forward with patients. So its like a few burning embers that were left behind that were able to reignite the fire for that first round of control. All right. Doctor, thank you so much. Youre quite welcome. Up next, a fragile ceasefire takes effect in the mideast. Will this one hold . Plus, the tech boom campaign is taking advantage of new technology to target you. 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But in the hours leading up to the threeday truce, there was heavy fighting. Israel now claims to have rooted out all those hamas tunnels they were seeking to destroy. Nbcs jim maceda has the latest from tel aviv. Hello there. Well, were nearly at the end of day one of this 72hour unconditional ceasefire, and its still holding. There was one incident near jerusalem today. A nonlethal stabbing of a Security Guard outside a major jewish settlement there. Otherwise, it has remained quiet. The Israeli Forces have pulled their troops out of gaza. Many of them assuming defensive positions in case things flare up again. Hamas, meanwhile, says it still has more than 3,000 rockets in its possession and it will use them if provoked. But there are reasons to believe this ceasefire will hold. The palestinians were much more involved in the process this time than three weeks ago when they rejeked a similar egyptianbrokered deal outright. Almost 1900 palestinians have been killed since then. So much destruction that the palestinians have much at stake to see it succeed. But all will depend on what happens at the talks in cairo. The israeli delegation is leaving either tonight or tomorrow morning to negotiate, it hopes, with the Palestinian Militants through the services of the egyptian intermediaries. But the sides are still miles apart when it comes to key demands. Hamas, for instance, wants to see the lifting of that 2007 israeliegyptian blockade, as well as the opening of all the border crossings. Israel, on the other hand, demands that first hamas and other militant groups give up their weapons, give up the rocks and the tunnels and basically demilitarize gaza, which is a red line for the militants. So people on both sides, israelis and palestinians, are hopeful, but they know the road ahead is fraught with uncertainty. Im jim maceda, nbc news reporting from tel aviv. Now back to you. Thank you, jim. Joining us now, friend of the show, former white house middle east adviser and ambassador to morocco, ambassador Mark Ginsburg. Ambassador, as jim just said, egyptian intermediaries are making a huge difference at this moment. They were not able to make a huge difference before recent memory. How is it that egypt has been able to become so helpful in foemting peace here . Theres three principle reasons. First of all, john kerry, secretary of state, has finally stepped back and let the egyptians and saudis basically work their will with the palestinian authority. Number two, the israelis have placed far more trust in what the egyptians are prepared to serve as intermediaries and to negotiate in effect the ceasefire on their behalf, believe it or not. Because last time secretary kerry tried to do this in paris t fell apart. Number three, hamas realizes at this point in time that the egyptians are going to have to play an instrumental role in the border crossings that jim maceda just mentioned. After all, part of gazas border lies with egypt. Its to egypt much of these supplies will need to come from in order to rebuild the devastation weve seen in gaza. Ambassador, how likely is it to hold this time around . The longest a ceasefire has lasted in this conflict so far is just one day. As we just heard, they both, israel and hamas, have the means to fire back if they want to. Whats different this tomb around . Whats going to make it so they dont fire back . Abby, thats the 64,000 question. Lets understand, this is really just a 72hour ceasefire. The clock is ticking as to whether or not these egyptian negotiations are going to result in prolonging the ceasefire beyond 72 hours. The main reason why this probably was at least agreed to were the following. One, the israelis at least have been able to destroy the terror tunnels that were lying on the border between gaza and israel. Number two, israel is relatively confident that it substantially degraded the missile capacity hamas has, even though perhaps many as 3,000 missiles are left. And number three, the israelis have no particular desire to penetrate further and to leave an Israel Defense force inside gaza. And probably, just to add one more, the pictures coming out of gaza have probably placed the israelis in such an untenable position that they needed to be able to regroup right now and to let some humanitarian aid get through and hamas to do the same. Ambassador, on the u. S. s relationship with israel, you reference the fact that secretary of state john kerry was not able to ultimately get a ceasefire in place when he tried in paris. There have also been some pretty sharp words of criticism coming from the u. S. , in particular about israels targeting of u. N. Facilities. There was a quote in the New York Times from a former ambassador to israel saying, this is the most sustained period of antagonism in that relationship. I dont know how the relationship recovers as long as you have this president and this Prime Minister. Do you think that sustained damage has been done to the u. S. Israeli relationship here . I always like to put this into a perspective because despite all of this acrimony between the personalities of Prime Minister netanyahu and john kerry and barack obama, the one thing that i always give this Administration Credit for is it has continued to provide the military and intelligence assistance israel has asked for. That has been unique among previous administrations. So all of this talk about personalities and difficulties, yes, theyre there. Ambassador, im going to interrupt you because we have breaking news. Were going right to the president right now, whos about to speak. Lets listen. Not only for the kind introduction but to bloomberg philanthropies as our cohost, and for the great work youre doing across africa to promote jobs and entrepreneurship. I want to thank our other cohosts. My great friend and tireless commerce secretary, penny pritzker. [ applause ] i want to welcome all of our partners who are joining us from across africa. Heads of state and government. And let me welcome the delegations from sierra leone, liberia, and guinea with whom were working so urgently to control the Ebola Outbreak and whose citizens are in our thoughts and prayers today. I also want to welcome madam chairperson of the African Union commission, president of the African Development back, as well as the president of the world bank, dr. Jim kim. Please give them all a round of applause. [ applause ] and i want to acknowled