we're counting on it hello everyone. the 11:00 hour starts right now. health officials have narrowed of the list of people they say are at higher risk of catching ebola after coming in contact with the man in dallas texas. administration members say they are ready to respond. >> i want to emphasize the united states is prepared to deal with this crisis. >> and overseas, isis is threatening the life of an american aid worker. we'll show you how e he ended up in harm's way. >> we begin with a threat of ebola. there is no outbreak in the u.s. but health officials in dallas say about 10 people are at

higher risk of catching it. the group had some sort of contact with this lie beern liberian man in dallas who has ebola. thomas duncan is in serious condition at a dallas hospital at this hour. the first person diagnosed with ebola in the united states. hazmat crews are cleaning the apartment he stayed in while he was sick. it's his girlfriend's apartment. she and her family has been quarantined there with his contaminated clothes and sheets for days. officials moved the family to an undisclosed yesterday. meanwhile the u.s. would move 4,000 troops to liberia. liberia is one of three nations that is battling the virus it's killed more than 3,000 people. ahead this hour dr. marcia lion will answer your questions. tweet them to us using the #ebola q and a.

and we'll get as many questions possible posed to the doctor as we can. now, where the ebola victim is being treated in dallas, we haven't seen them publicly come it and even give details of his condition or how he's being treated. what are you learning there? >> the latest word is that he still is in serious condition. but as you mention we are still waiting for an update today about the details involving thomas duncan. getting back to the missteps, fred, dallas county health officials have acknowledged missteps. it is front page news this morning, saying they acknowledge this and they could have done things earlier on in the process better. and they also added they did a lot of things right and the

public should not use confidence. they have a strong infrastructure and the resources to treat duncan. >> now the airport there and the liberian authority could be pressing charges. >> a couple of days ago we heard from the liberian airport authority there was a chance he could have falsified his health screening test before he got on the flight. passengers are asked if they ever come in contact with someone who had ebola. as we know from reports, it is reported that duncan helped a pregnant woman who was suffering from the disease and who later died. this could be an explanation as ho how he contracted the disease. but they are saying that could be grounds to president. and liberian airport authority says if he ever makes it back to liberia that is a possibility. also the local district attorney here saying that is a strong

chance as well. >> nick in dallas, keep under the circumstances -- keep us posted. the white house had never been in a situation like this. how is the bhous showing everything is under control after the mistakes made this we'll have that. and he volunteered to help the sick in syria. and isis now beheading another british aid worker. hennings murder is steeling the british government's resolve to defeat the terrorists. >> anyone in any doubt about this organization can now see how truly repulsive it is and barbaric it is as an organization. and as a country, we must do, with our ally, is everything we can to defeat this organization in the region but also to defeat it at home. >> hennings family issued this

statement saying, quote, it is the news we hoped we would never here hear. as a family we are devastated by the ghuz of his death. few words to describe how we peel at this moment. we are numb with grief. henninging is the fourth westerner isis has beheaded on video. and the way the isis video ended, american peter kassig may become the fifth westerner to die at the terrorists hands. a masked captor threatens the man's life saying his death will be president obama's fault. like allen henning, peter kassig went to the middle east to help victims of war. here is wendy longnecker from our indianapolis affiliate. >> back home from 2007, peter kassig decided studying the political science at butler was the next route to take.

he started in the spring of 2011. he would later tell a cnn reporter a year later in lebanon while doing humanitarian work something just didn't feel right at college. he wanted something more. a sense of purpose. >> i guess i'm just a hopeless roemtic and idealist and i believe in hopeless causes. >> so kassig trained as an emergency medical technician. he was looking for a game changer in life. he found it doing humanitarian work in the middle east. >> it's sad what is happening to people here. sometimes you got tyke take a stand. >> and his now life and death situation drew this statement from his former school butler university friday, since his time at butler peter has dedicated his life to humanitarian work in the middle east. the thoughts and prayers of the

butler university community are with peter and his family. >> and usual diplomas happening in south korea today. top officials from north korea made a surprise visit. the first such high level trip in years. kim jong-un meanwhile remains mysteriously out of sight. here is cnn's paula hancocks. >> this was surprising and significant. the man considered to be second in command in north korea after the leader kim jong-un popped to south korea for a last minute visit. he's vice marshal in the military and accompanied by two very high level officials in north korea. they were here to attend the closing ceremony of the asian games. the north korean delegation met the south korean ministers.

president park geun-hye said she could meet them as well. -- one man tells me he can't remember such a high level delegation from the north coming to the south in decades. shows kim jong-un although absena absent more than a month is still in charge. the statement of media is saying he has quote discomfort but experts saying seeing these officials coming to the south showing there is a high level of stability in the north. coming up we've got answers for ebola questions. the doctor who treated the first ebola patient in the u.s. and as we step up air strikes

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there has been another brutal killing of a western hostage by ice. this time the beheading of a british aid working allen henning and once against the terror group has released a video showing the killing. he was kidnapped the day after christmas and was the fourth western captive killed since august. prime minister david cameron says they will go after hennings killers. >> as a country we must do with our allies is everything we can to defeat this organization in the region but also to defeat it at home. and we must do everything we can to hunt down and find the people responsible for this.

>> isis also continues to target the town of cabany around the turkish border. >> everyone watching and waiting to see what comes next in the fight against isis. under siege for day, isis fighters who have been battling these kurdish forces, may now control part of the see syrian border town of kobeny, the fighting has been raging for days as the kurds try to defend their city from the isis advance. as tens of thousands of syrian refugees flee north to the nearby turkish border trying to escape the isis advance, the new wild card t turkish military. >> introduce turkish forces on

the ground would be a major change in what is going on there. now you would have a professional army dealing with is isis, something they have never had to face. >> the turkish parliament has authorized military action. but turkey's role, air strikes or grown troops is still uncertain. the pent dwagon is watching the fight in co-baany but the air strikes are elsewhere. >> it's really about the sustainment capability, the ability to use syria as a sanctuary and save haven that. doesn't mean we'll turn a blind eye any why. >> destroying an isis garrison, two tank, small oil refineries, a training camp and an occupied building. >> u.s. officials say isis fighters are reacting to the air strikes, staying off cell phonings, no longer moving

around in large convoys. >> they are changing the way they communicate. and i's harder for them. we've seen them change some tactic, not surprisingly have gotten better at concealment. >> isis released this video showing what it says is the scene of a coalition air strike. this english speaking fighter taunting. >> you are not bomb iing that state soldiers. you are just bombing the schools and the hospitals. >> cnn could not independently verify the video. >> u.s. officials say the fighting continues to grow near fallujah in iraq are isis is still very much on the advance. >> thanks barbara starr. have the coalition efforts been effective? let me bring in cnn military

analyst. >> good morning. >> you just saw in the piece from barbara starr that one isis fighter who is essential saying you are not hurting us. what you are doing is damaging the infrastructure here, the schools and the residents. so at what point are you able to tell whether these air strikes are helping the kurds hold on to and protect cabany. >> that final piece was a page out of the terrorist playbook. whenever they are struck and struck hard they immediately go into hey you are not hurting i us. it's typical. and we have reports proving effect. and they are changing their ways of operation. they are not communicating on cell phones. are not moving as much. al of those are the first page

of the beginning of the culminations of the offense. you will start seeing continued slow downs. you will see them to continue to group in smaller packages and all that is a precursor to being able to strike harder as the iraqi army improves and the syrian free army improves. >> ilts also sounds like you are painting the picture that it is more gift to spot them. harder to identify them. >> extremely difficult. they are now intermingling more with the population. remember the town we are talking about kobani is a relatively small border post. it is an important border post to them. operationally significant. just like the city of rabia in iraq just like a harbor gate. these are the areas where they bring foreign fighters in and also not talked about but the places they export their corrupt oil to get more money. so those border posts in and out of syria, and iraq are

critically important for bringing in jihadist in and exporting and getting more funding. what you are talking about is a small town. a town about as big as fairfax city in washington, d.c. about 4,000. and a fwiegt syrian kurds which there is another whole complex problem given the turks want to come in. and as was said in the piece, a lot of professional soldiers and tanks and artillery it's critical they start playing in this fight. >> do you see them sending in ground forces or would they also be involved by air? >> the turks have always been contentious because they have a bunch of national priorities that don't quite fit in with our what our national priorities are and they have a problem with the kurds in iraq and syria. the kurds want a space and the

turks see that as invasion into turkish space. so the potential of working closely with the kurds to provide security. so they are really caught on the horns of dilemma. parliament voted last week in terms of them sending forces but they haven't identified yet what it is. and general allen moving through the area. retired general allen know this is area very well and understands how to get the uprising of the sunni population and the kurdish population in iraq. all that is going to contribute to that culmination of the isis force eventually. >> lieutenant general mark hurding, things so much for your expiece this morning. >> thank you. >> many having tweeting their ebola questions. next we are have a infectious disease specialist here to answer your questions up next.

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this morning many of you have been tweeting questions about ebola to us here at cnn. #ebola q and a. back in august dr. lion treated dr. kent brantly when he was the first ebola patient to be fello

back to the u.s. he is going to be with us throughout the hour to answer your questions. before that, let me ask you about a thomas duncan and the treatment he is likely receiving in texas in dallas. he didn't get the z map like dr. brantly and mr. writebol received. what's different about mr. thomas duncan's case and treatment. >> my understanding is the mainstay of treatment is supportive care. so making sure that the fluid balance is correct. with a lot of vomiting and diarrhea this can be tough to manage. making sure the electrolytes or the salt balance is maintained. correcting any bleeding orders that might happen and making sure that the blood product, so platelets, red blood cells are in balance as well and don't get

too low. that is the primary focus of it. the question of experimental treatments like dr.s brantly and nancy writebol got. you know, whether those are available or not. i don't know if they are available at that point. >> when we hear from white house today where we had a number of representatives of public healthcare saying every hospital in the country has potential for isolation care. if a patient is diagnosed they can go to any hospital in the country and receive the right kind of care and isolation without putting other patients in jeopardy? >> they should. hospitals can isolate patients for any number of reasons. we isolate for different organisms. tuberculosis, chickenpox. mrsa. those are things that are probably familiar to most public. ebola is a little special but the principles are still in play

and any hospital ought to be table implement those. >> first question. if someone with ebola has been somewhere before you, say a plane or a bathroom, how long can ebola live on the surface? >> despite the severe disease ebola can cause in humans it is a wimpy virus it. it doesn't last long at all. at most, 30 to 60 minutes before it is dead. >> so why is it so lethal then? >> it's lethal because of what it does inside the body and the body's response to the virus. as the immune system ramps up it releases cytokines, and those cause fever, leaky blood vessel, drop in blood pressure and that is why it's so fatal. >> the other question from a viewer that was tweeted to us, what kills the virus? >> alcohol kills the virus, soap and water.

>> like the rubbing alcohol. >> yes. or the purrell, hand antiseptemberantisept antiseptics. it's actually pretty easy to kill. >> those things are very accessible here in the states. in sierra leone and new guinea there was a lack of that kind of supply. >> and not every place has running water. whereas here in the united states we have running water all over the place. soap and bleach and alcohol hand rubs are very accessible to most americans. not accessible in west africa. >> and another question we received via tweet. when do ebola symptoms start? and what are they? >> they typically start anywhere from -- we stay range is 2 to 21 days. most often it is 6-11, 6-12 days in that range after exposure.

and the most common symptoms up front are fever and headache and muscle aches. so very nondescript. many describe this as flu like. however you have to have that exposure to someone who's had ebola. so for the vast majority of americans, if they develop a fever at this point in time, no exposure to someone with ebola. >> i think that is why so many are nervous because a lot of the symptoms you describe sound like it could be a cold a flu, any number of viruses that people are typically used to. especially as we enter the fall and winter months. >> absolutely. and that exposure is key. and it has to be someone whose sick with ebola. the person who has ebola is not infectious until they develop symptoms. and there is not secondary transmission, likes i know someone who knows someone who had ebola. that is not being exposed. >> it had to be direct. >> direct exposure. >> thank you so much.

we're going to be back a little later on in the hour he is going to answer mer questions coming in via tweet. you can tweet to #ebola q&a and we'll try to get on as me as we can. up to washington right now. we'll go live to the white house to get the federal response to the threat, next. looks like we're about to board. mm-hmm. i'm just comparing car insurance rates at progressive.com. is that where they show

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health officials say about ten people of a group in fifty in texas are at a higher risk of catching ebola. they came into contact with the lie beern man hospitalized in dallas. on tuesday it was discovered. we'll get an update in about 30

minutes. and a fire in pennsylvania may have damaged artifacts to september 11th. this is new video from a viewer whose father was working at a nearby construction sight and spotted the fire and reported it. investigators are now investigating the damage. and thousands of protesters are still flooding hong kong's central district. at least 20 people have been arrested in clashes so far and in the seven days of protest, more than 150 people have been injured. students have called off talks with government officials. cnn's will ripley is there on the scene. so will, hong kong leaders have laid down another ultimatuultim. protesters have to clear out by

monday or else. what happens if they don't leave? >> they face a real dilemma because thousands continue to come here essentially creating gridlock, chaos whatever you want to call it around the city. this is a highway. but for the past week it's been full of these protesters. government employees had to stay home friday pause they couldn't get to work. the hong kong government knows they need to get the city moving again but if they try to use police force as they did last weekend, that only caused the size of the crowds to increase. so the options would either be large scale police operation or the insights we are getting is they may try to wait this out. but you see from the size of these crowds, as people continue to come here, whether they will dissipate or not is the open question. >> and then will, what is the hong kong government saying about the clashes that did happen last night? >> well there was a clash right

here on the pedestrian bridge why i'm standing. i can show you this is the area where uniformed police officer, dozens, marched and forced their way through a barricade that the protesters set up. at the site of the uniformed officers, all the crowd gathered in the street ran towards this area, started shouting in unison, police, police. it created chaos. and it's ps disaster if for government and the pictures coming out of hong kong beijing, the same source tells us is very concerned this type of movement could spread to other chinese cities. >> will ripley, thanks so much. keep u.s. posted. now to the latest on the first daged case of the ebola in the u.s. the first time obama administration is calling it a crisis. officials the watching ten people considered high risk after coming in contact with the man fighting for his life in the

hospital. so now they are reacting to the fact we this case and quarantined in the u.s. and involving his family members, people who were in contact with that man in dallas. >> said yesterday the administration is working with hospitals nationwide to ensure they know exactly how to handle potential case. they have issued guidelines and updated to those guidelines six times. and in each case then in turn is reported to the cdc. now for the american public, the administration is trying to tamp down the fears about ebola. >> with alarm growing over a potential ebola outbreak in the u.s., president obama sent out top officials to reassure the country. >> the united states is prepared to deal with this crisis both at home and in the region. >> our healthcare infrastructure in the united states is well equipped to stop ebola in its

tracks. >> the white house trying to show it has the situation under control after heated criticism that local health officials in dallas first sent ebola patient tomas duncan visiting from liberia back home before his family brought him back. that gap in care causing concern the disease could spread. >> there were things did not go the way they should have in dallas. >> the cdc is tracing any contacts duncan had. be as of now the obama administration is not considering increased screening for passengers coming into the oust are banning travelers from hard hit nations in west africa relying on screening from those countries. >> the most effective way is to prevent those individuals from getting on a plane in the first place. >> even as they sought to calm concerns officials acknowledge nay need to get more. >> we're having a press

conference because we need to get information out because there is a lot of fear. >> we cannot overcommunicate about this issue. >> officials also stressed that the healthcare systems in west africa are grossly inadequate. and that is why the u.s. is sending thousands of troops and disaster workers and aid workers so that they can correct the problem at its source. it's also stressed as you heard that the u.s. healthcare system should be able to handle any potential cases but we should emphasize should because of what went wrong in dallas, fred. >> thanks so much. still had johnny manziel might be changing his nickname from johnny football to johnny life coach? find out why next johnny

. all right let's talk more about ebola and answering your questions. the doctor is bachblgt you have been tweeting in questions here at #ebolaq anda. before we get to that why would u.s. hospitals be better equipped to handle patients with ebola? there is access to that. those would help treat or give supportive care to patients but it doesn't necessarily kill the virus. why is it that some patients,

their survival rate might be better than others, even with all of that equipment? >> you mean here in the united states? >> in the united states. >> well because of this immune system response that happens with ebola virus. some people have a very exuberant response and that can actually make you sicker before it makes you better. and if you get sick enough because of that, it may be quite difficult to actually keep someone live through that. so even though we have respirators, it could be difficult to provide enough oxygen through those respirators. and, you know, also having the availability of blood products to transfuse someone if need be. >> so let's get to some questions coming from you at home. first question, would any bodily fluids this patient flushed contaminate the water system? >> a good question. and actually -- the short answer is no. because all of our waste

treatment plants are designed to actually handle pathogens which are much hardier than ebola virus. so ebola is easily killed by waste treatment options. on the other side, water treatment system, when they get chlorinated, it would kill the ebola virus as well. >> could the virus become airborne? another question tweeted in. >> no. this is not an airborne virus. transmitted by contact, direct contact or droplets. large droplets the patient may produce. they typically fall to the ground within about a six foot radius of the patient. >> and then i'm traveling to dallas, should i be worried? >> absolutely not. no. you should not be worried about traveling to dallas. anyone potentially exposed has been identified and is under observation at this point in time. >> okay. >> and so the virus will be contained in that hospital room

within that ward and should not get outside of that hospital whatsoever. >> if it's been reported by many health officials that ebola has mutated. so many times, something like 40 times over a period of time, how do we know would it mutate and become air borne or perhaps change its impact on a person's body, meaning the symptoms would differ or evolve into something else, making it more difficult to spot, identify in other words. >> whether you are asking is would there be a big mutation? we see small mutations all the time. influenza virus mutates every year but it still is influenza virus. it still behaves the same way even though our immune systems don't recognize it as well as the previous season. these musicians mutations in ebola are very small mutations.

it might be variable enough the immune system doesn't recognize it if has been a different strain. so it is very unlikely we would see a mutation large enough that this would suddenly become airborne. it would to become a different virus altogether essentially. >> what should be the expectation when we hear that someone is kwar teened or under watch. family members, friends of mr. duncan have been moved and how to they are in quarantine. and others. and then we're members of the crew are flying back to the u.s. and will be under quarantine or watch. what does that mean? what do we envision? will they will be held up in homes with family members or taken to facilities depending on their home base where they will

be watched under the eye of medical professionals? >> correct. so quarantine, or watch, indicates that someone is being observed by medical professional, public health officials before they become symptomatic. once you become symptomatic, then you would fall under treatment and would be at a medical care facility, not in your home, not in isolation. they would be in isolation but not self isolation. so it is all before symptoms. at the top of the hour we talked about the incubation period between 2 and 21 days at the far end of time. and once those individuals have made it through 21 days without developing symptoms they can be released from quarantine because they are not infected ebola. so it is exposure and waiting to see if symptoms develop. >> dr. lion, thank you so much. of course we'll be addressing more of your questions

throughout the day. so continue to tweet us at #ebola q and a.

from one heisman winner to another, a current nfl quarterback plans to reach out to florida state superstar. kristen ludlow has more in today's bleacher report. welcome. >> good to see you. it's quite the duo. as a heisman winner and a

national champion, very few know exactly what it's like to command the limelight like james winst winst winston. johnny manziel is one. he says he plans to reach out to winston and offer some advice. reportedly, nfl teams are growing wary of drafting winston, despite his skill skpet his 6'4", 240-pound size. manziel won the heisman back in 2012 says, quote, the burden of following a heisman bid is heavier than the trophy and that winston should simply focus on football. now, yesterday, the anaheim duction welcomed the friendly but fierce face to practice as two-time u.s. olympic women's hockey player hillary knight took the ice. knight is now believed to be the first non-goalie female to practice with a full nhl team. she was met with a let's go, hillary chant, at the duction facility, and hopes to play in an nhl pre-season game one day. nooig says, quote, i'm one of those women who likes to push

boundaries. and now that he's taken his talents back home to ohio, lebron james is looking to sell the home he had in south florida. yeah, that one. >> looks like a hotel! >> the ten-time nba all-star is going to be suiting up with the cleveland cavaliers this season and his former miami mansion has been listed at $17 million. now, this home here has more than 12,000 square feet of living space plus an infinity pool and a dock large enough for not one, but two 60-foot yachts. >> that's gorgeous! >> you can put in your bid. >> yeah, okay. >> yeah, i can express my interest, i just don't have it to follow up on that. very good. good to see you. >> you too. >> you'll have to let's us know who and when a purchase takes place on that. >> oh, i will. >> okay. meantime, the search is on back in the indian ocean for that missing malaysia airliner. are crews any closer to finding the plane more than six months now after it disappeared?

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searchers are heading back to the indian ocean this weekend. they're looking for the malaysian airliner that vanished back in march with 239 people on board. this time around, searchers are going deep beneath the ocean surface, with new technology. cnn's tom foreman has more.

>> reporter: all through the thundering waves of winter, the ships have pressed on, across the indian ocean, pulsing out sonar signals and this is what they have to show for it. the northeast detailed map ever of the seabed in this area. 16,000 square miles covered with crumbling underwater volcanos, winding valleys, plunging canyons, and just maybe the solution to a mystery. the new map is not fine enough to show wreckage, but it is a wealth of information to guide underwater search vessels. >> tom, there makes a great deal of difference, because they'll be able to hold a tighter path, right above the ocean floor, knowing what's coming ahead of time, so they can go a little bit faster and get a lot more done in less time. >> reporter: before the search broke off earlier this year, much hope was pinned on the blue fin underwater search robot. it came up empty, but now with the new map, a much broader

search with sonar is beginning. they believe this is the right place to look, saying recent refinement to satellite data about the plane's flight path has given greater certainty about when the aircraft turned south into the indian ocean. and that gives them a better sense of where it ran out of fuel, most likely south of these submerged mountains called broken ridge. but -- >> you have to be very cautious about overpredicting or overconfidence in those predictions that you make, or you'll end up exactly where you thought you would, but it may not be the right place. >> reporter: don't look for people scanning the surface for debris, those days are over. now it is all about looking in some places nearly four miles beneath the waves. and once again, hoping for a break. the search is scheduled to last for about a year, and if they find the plane during that time, of course, it will be a huge

step. but a big mystery still remains, what ever caused this plane to go down. tom foreman, cnn, washington. >> and cnn's martin savage goes back to the beginning, retracing the key moments of flight 370 and asking experts the questions we all want to know. be sure to watch "van der: the mystery of malaysia airlines flight 370" this tuesday at 9:00 p.m. eastern. we have so much more straight ahead in newsroom and it all starts right now. all right. hello, again, everyone. i'm fredricka whitfield. here are the top stories we're following in the "cnn newsroom." from 100 to 50 to just 10. that's how many people the cdc now considers at higher risk for ebola in the dallas area. this as we await more information from the cdc, about the deadly virus here in america. >