dr. riche: population growth is heading towards some kind of stability as people replace themselves. but where it's located and how they consume -- that's the issue for sustainability. narrator: demographer deborah balk combines demographic and spacial data to examine how vulnerable populations in the coastal regions of developing nations will be affected by climate change. balk: prior work has predominantly looked at the causes of climate change. this study asks, what will some of the consequences of climate change be and what will those consequences be for human population and for human settlements? narrator: predictinguture population trends will help policy makers plan mitigation strategies to ensure a better quality of life for coming generations and to protect our environment. martha farnsworth riche is the former director of the u.s. census bureau, who was instrumental in designing the 2000 census. dr. riche: demography is really the science of studying people or studying populations. in

we're going to talk to our dr. rich besser in just a moment, but first for the very latest, let's bring in tom llamas. good morning to you. >> overnight a dangerous development in the fight against ebola. a health care worker at texas presbyterian hospital testing positive for the deadly virus. this is now the first person to be infected inside of the u.s. we just received a statement from the texas department of state health services. they tell us "a health care worker at texas health presbyterian hospital who provided care for the ebola patient hospitalized there has tested positive for ebola in a preliminary test." now, this worker cared for thomas eric duncan, the first ebola patient diagnosed in the u.s. we know the worker had a fever starting on friday. now, samples taken from the latest ebola victim have now been transferred to the cdc in atlanta for further confirmation. officials are now working to locate anyone who has come in contact with this patient. we're also working to find out if this hospital worker wa

and dr. rich besser joins us now. you opposed the quaun teen. why? >> well, the health care workers don't pose a risk. there are been hundreds and hundreds of workers in the region and returned to the countries. and you cannot share the infection unless you are sick. monitoring for fever works. we need to celebrate them as heroes so more people will go over. >> we heard from a lot of people out there, the viewers who support the quaun teen on the nurse. is there a middle ground? >> i understand the fear. we need the leaders to lead, not follow the pack. we are getting mixed messages. we hear the doctor pose nod risk but they want to the every place he visited and cleaned it up. they are moving from self-monitoring sof fever and every health care worker that returns will be monitored by a health department. >> dr. besser, thank you very much. >>> we move on to the high scol shooting in washington. students, the families and the community trying to understand how a boy just crowned homecoming prince could launch such a violent attack on his best friend

for "nightline," i'm dr. richbesser in monrovia, liberia. >> our thanks to the team for that important report. >>> next, the mystery deepens in the desperate search for missing college student hannah graham. could the suspect in her case be linked to other victims? >>> plus, new fashion icon amal alamuddin and her wedding dress, revealed. the constipation and belly pain feel tight like a vise. how can i ease this pain? (man) when i can't go, it's like rocks piling up. i wish i could find some relief. (announcer) ask your doctor about linzess-- a once-daily capsule for adults with ibs with constipation or chronic idiopathic constipation. linzess is thought to help calm pain-sensing nerves and accelerate bowel movements. it helps you proactively manage your symptoms. do not give linzess to children under 6, and it should not be given to children 6 to 17. it may harm them. don't take linzess if you have a bowel blockage. get immediate help if you develop unusual or severe stomach pain especially with bloody or black

our own dr. rich besser now home, talking about his latest mission to liberia. >>> closing in. a possible sighting of the man who is want for killing a pennsylvania state trooper. >>> a romantic hot air balloon flight with a surprise ending. >>> and the miracle crash. incredibly, everybody is okay after this one. you have got to see this video. >>> well, good monday morning. we begin with the latest on the ebola patient fighting for his life in a dallas hospital. >> thomas eric duncan is so sick doctors are not giving him the experimental vaccine. we begin with tahman bradley. >> reporter: this morning, thomas eric duncan, the first person diagnosed with ebola in the u.s. remains in critical condition. his family says he's unconscious, on a ventilator, and on dialysis. duncan's girlfriend is frustrated with the care he's receiving. >> i don't think americans, they are doing enough to save him. >> reporter: his girlfriend and family are having their temperatures taken at least twice a day. while specially train eed hazma crews are decontaminated their apartment. >> being here sc

. >> okay, dr. rich besser, thanks. great to have you back. let's take this now to dr. tom frieden, the director for the centers for disease control. you just heard dr. besser right there. is he correct? >> well, absolutely. the virus is moving so fast but our response is moving very fast, as well. the defense department is on the ground. they're working with 135 of the cdc staff who are there and working with usaid and others and the challenge of putting up a treatment unit isn't easy. it's not a question about construction. it's about training, supervision, supply chains and all of that is moving, but we wish it would move faster but it's moving faster than it was a week or two ago. >> i want to get back to that in a minute but let's talk about the situation in the united states now. we heard that a patient treated in nebraska for ebola, dr. rich sacra, is back in the hospital in massachusetts. what can you tell us about that? >> it's extraordinarily unlikely that it would be a recurrence of ebola. we've never seen that. but we're not going to take chances so we'll te

our own dr. rich besser now home, talking about his latest mission to liberia. >>> closing in.man who is want for killing a pennsylvania state trooper. >>> a romantic hot air balloon flight with a surprise ending. >>> and the miracle crash. incredibly, everybody is okay after this one. you have got to see this video.

this as our dr. richf the hot zone in africa. >> lots of check points. >> the precautions flight attendants are taking in the air. >>> isis strikes again. beheading a fourth hostage, a british aid worker. now threatening to to kill this american next. what his family is saying this morning. >>> a shark attack. look at this. a great white taking a bite out of this kayak. >> those are holes from a great white shark. >> kayakers tossed into the water, terrified

this as our dr. richs out of the hot zone in africa. >> lots of check points. >> the precautions flight attendants are taking in the air. >>> isis strikes again. the terror group beheads a fourth hostage, a british aid worker. now threatening to kill this american next. what his family is saying this morning. >>> a shark attack. look at this. a great white taking a bite out of this kayak. >> those are holes from a great white shark. >> kayakers tossed into the water, terrified the shark would come back for more. who finally came to their rescue. >>

this as our dr. rich besser journeys out of the hot zone in africa. >> lots of check points. >> the precautions flight attendants are taking in the air. >>> isis strikes again. beheading a fourth hostage, a british aid worker. now threatening to to kill this american next. what his family is saying this morning. >>> a shark attack. look at this. a great white taking a bite out of this kayak. >> those are holes from a great white shark. >> kayakers tossed into the water, terrified the shark would come back for more. who finally came to their rescue. >>> and caught on camera. not so special delivery. the u.p.s. worker caught throwing packages and caught ripping them open. what he was looking for. >>> all right, good morning. also coming up, the dramatic conclusion to a long-running and strange case of alleged parental abduction. >> a little girl kidnapped a dozen years ago in texas now found in mexico. her mother accused of going to extremes to evade the law. we are learning about the 12 years sabrina allen

if you want to follow him on twitter, you can do so at dr. rich carmona. go to ken joining us from holton, indiana. good morning. >> good morning. i was wondering. i don't know who to make the suggestion to or whatever, but while we are not using like the jails and the prisons that are not in use, you know, big complaints a couple of months ago about the jails not being used and have been built under multi-million dollar items. >> good for what, ken? caller: used for the ebola patients and what have you, to keep them away from the places like hospitals that already have a thousand or 2000 people in them. host: okay. we will get a response. dr. carmon a? >> guest: thanks for your comment. unfortunately, in our country, i don't know any jails that aren't being used or overused. correctional can you recall is one of the fastest growing industries in our country and that's a real sad fact. how far, the buildingses, themselves, really are not made to have people with infectious diseases because they don't have the appropriate air stem cells, air exchanges and w

. >>> abc news chief health and medical editor dr. richr has just come back from the hot zone in africa. rich, good morning to you. >> good morning. >> lots to discuss here but let me start with the question that is undoubtedly going to be on the mind of many of our viewers. is it safe for you to be boarding airplanes as you've just done and interacting with your family members at home and then coming into the studio here? >> yeah, it is. the thing about ebola is you cannot transmit the disease unless you're sick. and so abc news talked with cdc and went through the guidelines. i know the guidelines. if i were to develop a fever, then i shouldn't be here. i shouldn't be around people, and so i'm monitoring my temperature twice a day. i took it before i came into the studio, and it means i'm safe. it doesn't mean that everyone is going to be comfortable around me but it means that there's no risk of me spreading this disease to anyone here or anyone i meet on the street. >> and you're being very sensitive. i want to let our viewers know, th

if you want to follow him on twitter, you can do so at dr. rich carmona. go to ken joining us from holton, indiana. good morning. >> good morning. i was wondering. i don't know who to make the suggestion to or whatever, but while we are not using like the jails and the prisons that are not in use, you know, big complaints a couple of months ago about the jails not being used and have been built under multi-million dollar items. >> good for what, ken? caller: used for the ebola patients and what have you, to keep them away from the places like hospitals that already have a thousand or 2000 people in them. host: okay. we will get a response. dr. carmon a? >> guest: thanks for your comment. unfortunately, in our country, i don't know any jails that aren't being used or overused. correctional can you recall is one of the fastest growing industries in our country and that's a real sad fact. how far, the buildingses, themselves, really are not made to have people with infectious diseases because they don't have the appropriate air stem cells, air exchanges and w

dr. besser today. let's bring in rich from dallas now. and dr. besser, we know that kent brantly's blood, his anti-bodies were used to help some of these patients. but he's just one man here. so, where are we on that and on that experimental drug with now another nurse getting sick? >> reporter: yeah, at this point, we don't know whether his blood is the same type as amber's. if it is, he could donate for her, as well. other drugs are under development, but the main treatment she'll be receiving is fluid replacement and nutrition. many patients get better with that alone. >> but those drugs still in treatment and not ready to be administered to these patients. and rich, we know the second nurse infected flew from cleveland back home to dallas. not knowing she was sick. but that other nurse was already in the hospital, so, the question, why wasn't there an alert to everyone who worked with nurse number one not to get on a plane? >> reporter: yeah, david, at this point, we don't know that she even received a warning to not get on that plane. that's

. >> let's bring in jon karl and dr. rich besser. the president outlining what he's going to do as republicans like speaker john boehner calling for a travel ban. others saying that the director of the cdc needs to be fired. >> reporter: the president has confidence in the director. and a travel ban would be a problem, hindering the flow of relief workers to and from west africa. but the president acknowledged they should have been more aggressive at the start. the bottom line is the same. the president said that he is absolutely confident that they can prevent a serious outbreak of the disease here in the united states. >> what the president did not announce yesterday is something you have been talking about. taking any ebola patient to a special treatment center like the one at emory university where amber vinson is right now. >> i think that was missing from the statement. one thing the go teams, rapid response teams would be looking at, if they can be treated there or transported. but i think it's a stretch that any hospital can

. >> and, rich, pretty clear from dr. varga, he said his nurses followed their guidance to the letter. >> yeah. i expected him to throw a little blame in cdc's direction. but, he basically said that cdc was learning along with them. they were following the guidance as it was. but following that guidance, two of their nurses got sick. >>> and, rich, what about this universe of people that were exposed to mr. duncan? how close are they to being in the clear at this point? >> reporter: the good news for those exposed to him before he came into the hospital, sunday is the 21st day. it would be unusual for anyone right now who had that exposure to get sick. but in the hospital, this is the critical period. day nine, if someone was exposed and were sick, they're going to show symptoms right around now. >> rich and i will be holding a facebook town hall meeting on ebola this afternoon. you can post on "gma's" facebook page. we'll be answering them starting at 1:00 p.m. eastern on a live stream at goodmorningamerica.com on yahoo!

dr. rich besser is here. let's start with more on what the cdc is considering now. expanded screening? >> they're thinking about sending public health advisers to the airports that have quarn fe teen stations. the challenge is there are no direct flights from that region to the united states. i flew from liberia, to brussels, to zuri,ch to the u.s. it basically says i same from zurich. >> you just got back from a week in liberia. talk about the precautions you took while you were there. >> incredible. the first time i shook a hand in ten days was when i arrived back in newark. i wore a special suit in the ward doing the stories on people there. and on the street, you avoid touching people and after every shot, it's washing with bleach. hands, feet, boots. to make sure that you don't pick up anything. >> and you're completely asymptomat asymptomatic. >> yes. until you're sharing body fluids, you're not going to spread it to anyone. there's a comfort factor there as well. >> we want you the weigh in on the next story as well. please stand by. >>> to the other big heal

dr. rich besser with a reality check. one of the questions from kathy.ould anyone be flying if it can be avoided? i'm concerned about my young grandchildren. should we wear a mask to protect ourselves and our family? >> george, we talk about flying and the risk of getting colds and flus. but the thing about ebola is, it doesn't -- it's not spread that way. you have to have direct contact with body fluids. the people getting ebola are those taking care of patients in the hospital or at home. and no one in america has flown with symptoms of ebola that would allow them to spread. the nurse from dallas, she was flying, she didn't have any of those symptoms. so there's no risk there. i always think it's a good idea, hand washing or alcohol sanitizer on a plane to cut down on colds or flus. but don't worry about ebola. >> and we just heard from george. he was talking about the school in mississippi. a lot of people are really concerned when it comes to their children. in fact one we got via twitter, from julie, how serious is the disease going to get, and how

dr. rich besser is here. doctor, let's start out with more on what the cdc is considering now, some kind of expanded screening? >> they're thinking about sending public health advisers to the airports that have quarantine stations. and doing additional screening of people who come in, people who come from that region. the challenge is there are no direct flights from that region to the united states. i flew from liberia, to brussels, to zurich, to the u.s. so it basically says i came from zurich. identifying them is hard and it wouldn't have picked up mr. duncan, because he didn't get sick until four days after he got here. >> you just got back from a week in liberia as you were saying. talk about the precautions you took while you were there. >> there were incredible precautions. the first time i shook a hand in ten days was when i arrived back in newark. you don't touch anyone while you're there. i wore a special suit in the ward doing the stories on people there. and even on the street, you avoid touching

dr. besser with us from dallas. rich, thank you. president obama speaking shortly before we came on the air and i want to bring in jonathan karl, and jon, what did the president say we will do from this point forward? >> reporter: david, the president said he has ordered the formation of a rapid response team, essentially a medical s.w.a.t. team that would go into action immediately if there are any further cases of ebola. and after meeting with his team for more than two hours tonight, he said that he is absolutely confident that we can prevent a serious outbreak in the united states. >> all right, jon karl live at the white house. jon, thank you. and one more note on this tonight. wall street. ebola fears rat. ing the markets today. among the concerns. the dow closing down 170 points. at one point, swinging more than 600 points during trading. >>> but we do move on tonight. powerful storms in the east sweeping through the m mid-atlant mid-atlantic. this is time lapse video of the hail in washington, d.c. the capital suddenly hidde

dr. richy of ebola in america starts here in this neighborhood. i'm in a small courtyard. this is where thomas eric duncan lived. he brought ebola to texas. in the late afternoon he walks a quarter mile to this local health clinic. he's checking in on his neighbor, 19 and pregnant. she's very sick. nurses showing us her chart. so she had weakness, poor appetite? she fainted. when duncan arrived. the situation is grim. she was not getting better. her pressure was low. she had anemia. malaria. they said she needed to go to the hospital. they called for help. called for a car. duncan helped put her in the taxi and climbs in with her. 20 minutes later they arrived at the ebola treatment center at jfk hospital, a place where patients wait desperate to get in. no room for her. they try to another clinic. no room there either. they return back home, returning here to their neighborhood. eric duncan helped her from the car. they went right from here don to her house. that green house right there. he h

dr. david rich and his team were ready when their first potential ebola patient walked through the door.e believe within seven minutes he was placed in isolation. >> i tried to get up and leave and go to the bathroom. there were security guards outside my door. they said no one in or out. >> reporter: having seen the first ebola transport patient on tv, nurses and doctors at mount sinai used similar gear. >> were people scared? >> the staff was very anxious. >> reporter: dr. scott lauren runs mount sinai's medical intensive care unit. >> they had complete has mat covers with hoods on. eric was in the same way. they wheeled him up -- it was very dramatic when they entered the intensive care unit. there was about five to eight people wheeling him very, very rapidly into the isolation room in the icu. >> reporter: so this is the isolation room where eric was kept for the few days. a small team of doctors and nurses would suit out just out here in those special white protective suits. they would go inside, take his vitals, examine him, take his blood. afterwards anything he had come into con

dr. richard besser and george stephanopoulos who will be hosting "this week" later this morning and, rich, dr. besser, let's start with you. what should happen next with the lab technician that's on board of that cruise ship? is the caution warranted? >> i think that whathey should do is leave that person ale. and here's the reason. she never had contact with eric duncan. she never had physical contact with any of his body fluids. i'm not sure why they were watching her. and i'm not sure why they tested her blood because for ebola your blood test is only positive if you have symptoms. she's 21 days out. let her go, let her alone. she's not a risk. >> 21 days is that incue base period and speaking of as of today, family members of thomas eric duncan, the ebola patient who died, are no longer under quarantine. what does that tell us? >> this is good news and hopefully for a lot of people it's reassuring. these are the people that had the closest contact. some were living with him in the house. his fiancee who was in the house for four days after he was in the hospital, negative. this shows

if you want to follow him on twitter, you can do so at dr. rich carmona. go to ken joining us from holton, indiana. good morning. >> good morning. i was wondering. i don't know who to make the suggestion to or whatever, but while we are not using like the jails and the prisons that are not in use, you know, big complaints a couple of months ago about the jails not being used and have been built under multi-million dollar items. >> good for what, ken? caller: used for the ebola patients and what have you, to keep them away from the places like hospitals that already have a thousand or 2000 people in them. host: okay. we will get a response. dr. carmon a? >> guest: thanks for your comment. unfortunately, in our country, i don't know any jails that aren't being used or overused. correctional can you recall is one of the fastest growing industries in our country and that's a real sad fact. how far, the buildingses, themselves, really are not made to have people with infectious diseases because they don't have the appropriate air stem cells, air exchanges and w

dr. richard besser and rich, you have said from the start that unless doctors and nurses were brave enougho go to west africa, we would not get a handle on this, but this is what happened to her when she came back. >> reporter: the fear is that this would have a chilling effect and people wouldn't want to go over. tonight there's news out of the cdc, new guidelines with what to do with health care workers to come back, they focus on monitors. we feel better when someone's under quarantine, it's not based on science. we don't need it to control the disease. >> self-monitoring now. >> reporter: that's right. >> rich, thank you. >>> we're going to turn now to troubling new images tonight in the battle against isis. a new video showing a british hostage, but this time, a new backdrop. and these images containing clues. abc's chief global affairs correspondent martha raddatz has been studying the new tape and up said earlier that this is very bold. >> reporter: it is indeed, david. if this video is real, right in the middle of the battle for the strategic town of coe bkobani, broad daylight is

dr. richard besser, back with us tonight. and rich, you're headed to dallas tomorrow, but in the meantime, i wanted to show folks at home those four hospitals again tonight, where they have teams who have practiced for ebola for years. and you and i were asking on the desk here last night, why they haven't sent those teams to dallas to help out and what have you learned tonight? >> reporter: well, we've now learned that they have. they sent two nurses down there to help oversee care to make sure no one else gets infected. and they've said for any patient in the country who develops ebola in the future, a go team will go immediately and decide whether to send that patient to one of the four hospitals. >> a lot of people are going to ask why it took so long. in the meantime, something else we saw today, about how contagious ebola is. a tiny amount of blood with hiv, 1 million virus particles. a tiny amount of blood with ebola, 10 billion virus particles. you worked for the cdc for years. what do the numbers tell you? >> reporter: well,

dr. richard besser with us again tonight from dallas. rich, thank you. >>> and this evening, nina pham, the nurse being rushed to maryland, is sending a message out to the public, saying she is now in good condition. she is feeling blessed, gaining strength, she says thankful for the outpouring of love, even as she's moved. adding a special note for her team of doctors and nurses, calling them the best in the world. tonight, meanwhile, abc's tom llamas also in dallas, sitting down with a member of the medical team inside that dallas hospital, a nurse who says they had no training. >> i'm devastated. i'm devastated for my hospital. >> reporter: this is brianna aguirre, a nurse at texas health presbyterian hospital. she describes a harrowing scene in the hospital when thomas eric duncan died. >> it was extreme chaos. it was unbelievable. the nurses were just throwing our hands up, saying, "you got to be kidding us." >> reporter: later, aguirre treated fellow nurse nina pham in that hospital, just before pham was officially diagnosed with ebola.