this is "nightline." >> tonight, ebola in america. the first case of the deadly disease diagnosed in our country. could he have infected? others? our dr. richard besser in the place where it all started. with more aid on the way, an urgent quest to stop the spread before it's too late. plus, serial killer? this suspect, allegedly the last person seen with missing uva student hannah graham, but now police investigating whether he could be connected to the murder of at least one other woman. as the search for hannah continues, new clues connecting him to a cold case. could this arrest be even bigger than they thought? and -- here comes the blushing bride. george clooney may be an oscar winner, but there's a new star in town. stealing the spotlight in a

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good evening. tonight, it's confirmed. the first case of ebola diagnosed inside the united states. now, a race against time. could he have infected others? our dr. richard besser suits up and goes into the hot zone to find out what we could be facing with ebola in america. >> reporter: it was the news america had been dreading. >> today, we are providing the information that an individual traveling from liberia has been diagnosed with ebola in the united states. >> reporter: for the first time, the disease that had been decimating several countries in western africa diagnosed here in this country. >> this individual left liberia, arrived in the united states on the 20th of september, had no symptoms when departing liberia or entering this country. >> reporter: two days later, the patient went to a hospital. and was sent home, undiagnosed.

it was not until sunday, september 28th, that the patient was admitted into a hospital. >> i have no doubt that we will control this importation or this case of ebola. >> reporter: who is at risk? the only people who had contact with him when he was sick and only if he had contact with his body fluids. this is the first person to travel from liberia to the united states, unknowingly infected with ebola. we traveled in the reverse direction, into the heart of infection in liberia, to see how efforts to stop the disease here are going. before it spreads to even more countries. hello. >> good to see you! >> reporter: yes. it's been a month since i've been here. good? monrovia, liberia. one epicenter in the deadliest ebola outbreak in history.

one month since we were here before, the number of cases in liberia have more than doubled. we want to see, has the response changed? the outbreak first started in december and spread across the borders into sierra leone and liberia. killing more than 3,000 people. a crippling lack of doctors and distrust of government have allowed this outbreak to explode. now, international response is starting to ramp up. president obama promising to send as many as 3,000 military personnel to build 17 treatment centers and train thousands of health care workers. a 25-bed field hospital to treat sick medical workers just arrived. in the cap tam, there are limited treatment facilities. but in many parts of the country, there are none. we're on the road, we're following two makeshift ambulances that are heading to a small village to pick up two patients who they hear have ebola. one is a mother and the other is her 6-month-old baby. a four-hour drive with every bend of these dusty roads, the city mets away.

these roads may be less traveled, but they've been the highway that brought ebola from the jungle to the world. there's someone in the village with ebola? >> yeah, we have a contact. so, we carry one confirmed case and then we have probable case. now there's another, the baby is presenting symptoms. >> reporter: the baby had contact with someone with ebola. >> with the father. >> reporter: i see. and so we're getting the mother and the baby. is the mother sick? >> no. >> reporter: no. >> the baby is six months, so, we can't leave the mother and bring the baby. >> reporter: you bring them together? >> we have to come with the both of them. >> reporter: the baby does not look well. very limp. the mother's name is garme, and so far, she's healthy. >> reporter: if the baby has ebola, the baby is being held by other people, as well. so, you can see how easily it is to spread ebola in this kind of living quarters.

it's far too dangerous for me to go in there without full protective gear. it's very close quarters. and we know that the father who lives here is -- does have ebola. the baby, the mom, they all live in that area, so, they'll go in, they'll spray down the whole area, collect anything that's soiled and get rid of that. they will take garme four hours away to a ebola treatment unit. they have hoping to meet up with their husband matthew, who is hospitalized there. it will be a long drive. a sick baby in a smackshift ambulance. this ambulance, they laid a mattress down right here in the bottom. mom and baby are comfortable in the back. are you okay? yeah? we ride out with them. careful not to touch. but first, we need to pick up another patient. >> what is happening to you? more blood coming from your mouth. >> reporter: a bloody mouth. a tell-tail sign of a bad case of ebola.

his father had been given antibiotics for his son. sounds like you had quite a journey to get your son treatment. >> i walk an hour and five minutes from here to my village. >> reporter: yeah. we once again head out towards the treatment center when weapon are reluctant witnesses to fresh tragedy. >> getting heavier. >> reporter: matthew lincoln, garme's husband, has died. before she and her husband even reach the unit. now he's being buried here in the woods and his wife, his mother, his son are in the unit. they can't come to say good-bye. wow. rows of empty graves. they know what the future is going to look like here. and it's not good. a grim reminder of how most stories here will end. ♪ but some say the tides are turning. ♪ good morning, good morning. we finally arrive at the ebola

treatment unit. it's been set up by aid organization save the children. and now run by doctors from international medical corps. four hours by car, two miles on a muddy road through a leper colony to get treated. >> and people do it. that's the only option they have. >> reporter: this facility, only 13 days old. too soon to know for sure if they've saved any ebola patients. buff they are getting supplies and more beds. >> started with ten beds. 12 days ago. and now we've got to 25 beds. >> reporter: you all seem like veterans. >> yeah, you learn quick. >> reporter: so far, four american aid workers have gotten infected serving in west africa. and all have survived. >> the fatality rate is lower in western medical system in the u.s. than here because the level of supportive care and intervention that you can provide in that setting. right now, we are doing the best we can for the greatest number. >> reporter: here, they boast of lower fatality rates and never

having a health care worker die from the disease. but due to my experience with infectious disease, i knew it wasn't safe for my producers to go in. so, i went in alone. this may be the first time an american journalist has been allowed to go in. getting hotter with each layer, but feeling safer. sufting up this carefully, layers and layers of protective gear. >> that's how we identify one another. >> reporter: very good. dr. jerry brown is in charge. he prays every time he goes into the ward. >> protect us from every danger. once you come in here, you don't ever go back. that's it. we're now considered contaminated. >> reporter: 60 people in a ward built for only 40. the wards the u.s. is building won't be here for weeks. america realizing we must stop e ebola here so it doesn't continue to spread around the world. my head knows i'm completely covered, but my heart pounds anyway. ravi is a 26-year-old who caught the virus from his roommate.

dr. brown is his savior. >> he gave me life. >> no, i'm not god. >> he gave you life. >> yeah, he gave me life. >> reporter: this is the first time i felt like i was in an actual ebola hospital. the incredible difference a clinic like this makes, the ability to talk to patients, to see a smile, a laugh. >> put food in my mouth. feed me, please. >> reporter: feels so much better. whoa. i don't know how you do it. dr. brown, that's incredible. i was struck, though, by how many patients in there are doing pretty well. each one told me the story of coming in deathly sick and many of them are watching tv and eating food. it's -- it's really incredible that people are truly getting better. amid all the sorrow and all the grief, for the first time, there is hope. for "nightline," i'm dr. rich

be besser 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

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see her alive, could be tied to more gruesome crimes in the area. now files of other missing and murdered women are being opened up again. here's abc's steve osunsami. >> did you see hannah? did you see hannah? who saw hannah? >> reporter: hannah graham and morgan harrington. up until now, they're only connection was that they're both college students from the state of virginia, and both disappeared after they were walking alone at night. >> all the police tip line with anything that just might help us to bring hannah home. >> reporter: but now, the two young women and their families may be connected through tragedy. police are saying they have new forensic evidence that may link the recent disappearance of graham to the unsolved death of harrington from 2009. police searching for graham call it a significant break. but wouldn't elaborate. and it came after investigators searched the car and apartment of 32-year-old jesse matthew, accused of kidnapping graham

after being seen with her in these surveillance videos on a friday night into saturday morning. the parents of 20-year-old harrington believe it supports what they've been arguing for weeks. that the suspect in graham's disappearance may be the same person who killed their daughter five years ago. >> that's what it's always been about. help save the next girl. i can accept it, because i fought vigorously just like morgan did that night. i fought for five years to prevent him from killing another person. or taking another person. maybe we kept him from offending some other time, i don't nope. >> reporter: but police aren't confirming a dna connection, only saying that it's a new forensic link for investigators to pursue. there's still a great deal of work to be done in regards to this investigation, and we appreciate the public's patience as we move forward. >> do they have fingerprints of jesse that were found on items

when the 2009 victim was recovered? do they have hairs and fibers, in other words, unique material off a jacket? >> reporter: but police did find a dna match between the harrington murder and a third case, a sexual assault in 2005, in a d.c. suburb. the 26-year-old victim was walking home from a grocery store when she was grabbed from behind. police are now looking at this rough sketch of the suspect witnesses saw running away, trying to determine if this is matthew. at the same time, they're still searching for hannah graham, a second year student at the university of virginia. her parents had just sent her off to school. now missing for over two weeks. she was last seen early saturday morning after 1:00 a.m., near the tempo restaurant and bar in downtown charlottesville. in the minutes before she was seen on surveillance video outside of this irish pub, and then walking under a small overpass alone. she starts running, but it doesn't appear she's being followed. and when she gets to the downtown mall, you can see in surveillance video someone is following her.

police now think the man was a good samaritan who they don't believe was a suspect, was concerned she was intoxicated and says he backed away once he saw her looking very comfortable with a man who looked like a friend. that friend, police say, was matthew. a week after graham disappeared, matthew walked into the charlottesville police department on his own and spoke with a lawyer but sped off before answering any questions from investigators. the police chased him and lost him. four days later, a sheriff's deputy in texas took matthew into custody after getting a tip from a woman who spotted him on the beach. >> jesse's been described as sort of a smooth-talking, kind kind of person on the outside and so they might be attracted to him for help. i'll give you a ride. i'll take you some place. whatever it might be. so, from that standpoint, there is -- there appears to be some similarity between 2009 and hannah's case. >> reporter: in 2009, harrington

was visiting the university of virginia for a metallica convert when she went missing. police found her body on a 700-acre farm outside charlottesville three months later. this is the area that police are asking farmers and home owners outside of the city to search. it's wide open spaces, lots of trees, lots of woods. and it's just about a mile down the road is where police in 2010 found the body of morgan harrington in a field. so, they're asking farm owners and land owners here to check their properties, to look through abandoned homes or barns, just to see if they see anything. >> we know where morgan is. morgan's in a box over there. hannah graham is still missing. and her family needs to know where she is. we need to bring hannah home. >> reporter: the list of the missing is long, so many cases like graham and harrington. this year alone, 116 missing in virginia, all under 20 years old.

matthew is charged with abduction in the graham case and has not yet entered a plea. police say he is not cooperating. there's no way of knowing if he's responsible for graham, harrington or anymore victims, but police are chasing all leads as they continue to search for graham. for "nightline," i'm steve osunsami in charlottesville, virginia. next, all aboard for wedding weekend. amal made a married man out of george clooney, and a cat walk out of venice. but who did she choose for the big day? ah! come on! let's hide in the attic. no. in the basement. why can't we just get in the running car? are you crazy? let's hide behind the chainsaws. smart. yeah. ok. if you're in a horror movie, you make poor decisions. it's what you do. this was a good idea.

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he always said he'd never get married again. but that was before george clooney melt a gorgeous multilingual lawyer with a roster of accomplishments. and now, amal alamuddin has become a certified style icon, as well. here's abc's lama hasan. >> reporter: day five of the clooney craze. and today is all about that wedding dress. "people" magazine and "hello" with a first look at the 36-year-old amal alamuddin making an honest man of george clooney. in this custom oscar de la renta french lace wedding gown. check out that off the shoulder neckline. those hand sewn pearl accents. and that full circular train. and it is getting rave reviews. >> that dress. >> reporter: george wasn't looking to shabby himself in a custom tux by jgiorgio armani.

his beautiful bride stole the show, from the first day of festivities to the last, turning the canals of venice into her personal cat walk. making a splash in this striped doll chai and gabbana number. leaving a lasting impression in this show-stopping alexander mcqueen gown for the rehearsal dinner. look familiar? first lady michelle obama sported a similar version in 2011. more importantly, i started the red dress trend when i arrived in venice to cover the nuptials. but we both give you our blessing, amal. and for monday's civil ceremony, a scream colored lady-like pantsuit by stella mccart nooe. check out how eager george looks, leading her by the hand as they go to make it official. also official, amal's place in the fashion hall of fame. for "nightline," i'm abc's lama hasan in london. >> it's almost not fair of beautiful they look. thanks for watching abc news.

tune into "good morning america" tomorrow and as always, we're online at abcnews.com. good night. [cheers and applause] >> yeah! hey! [laughing] thank you! welcome to the show, everybody. i'm terry crews. some of you may know me from brooklyn nine-nine, and i'm also lucky enough to be here hosting millionaire!

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