>> frontline is made possle by contributions tyour pbs station from viers like you. thank u. th additional funding from the park foundatn. committed to building publ awareness. major nding for frontline d frontline world provided by the john d. and catherine macarthur foundation. coitted to blding a more just, rdant and peaceful worl frontline world is made ssible by shellsupporting people of the press... as you can see, peoplare gathering around. >> ..nd the independent journalists... >> how do you respd to these arges? >> ...who tell e stories of our time. and by thekoll foundation. withdditional funding from ott fearon. >> in the aftermathf iran's disputed election... >> whoas neda? why was she lled? >> a young woman's brutal murder... >> look this girl, she is voming blood. >> s uploaded to the world. >> you think to urself, "i could be her." >> tonight, t inside story of ne agha soltan's life... >> nedalways said she would leave iran if she d only one y left of her life. >> and the tragic events that leto her death. >> he basically id that "i'm giving you the green light for you kill them. just g rid of these people who are on the streets." >> and later, atory from frontline worl in ugand new dangerous viruses that can jump backnd forth between humansnd the great apes >> you c't protect the gorillas if you dot think about the people living arnd the park whoave very little health care. >> narrator: ts is the street inentral tehran where neda agha soltawas shot this suer. three months laterour cameraman risked aest to film the placwhere she died. he looks for aplotch of green paint on the road, aign of the protest movement that lled these streets june. to keep her name alive, protesters graiti the walls, but the authorities keep whitewashingt out. from the beginningit's been a story the regimeould not suppress. >>'m going to show you a clip now. is is disturbing, i want everyoneo know that. but, uh... we have blued out her face o of respect. but th is possibly the most seen piece of video out ofran inhe world. >> narrator: a 90-cond camera phone video had set ofthe firestorm. >> we cannot confirm the situation, nor her name. ( yelling ) >> ( transled ) that look ill challenges me. it's with all the time. i cat forget i the blood that gusheout of her mouth and est, that's always with me. ( yelling ) >> i mea seeing that, outside of iran, it's scar t when you were actually there, and youhink to yourself, "i could bher." >> ...a sty that she had been a bystander at a ptest. >> what doeshat mean? is there an investigion? what havyou learned? what hpened to neda? >> ( trslated ) now, let's see what... whatappened. >> narrator:ven months later, the regime was being preed to exain it. >> ( translat ) it is indeed regrettable. i'm very sorry that onof our fell citizens was killed, especially a person who wasn... i mean, shwas not especially... she was not a person... she was not in protest.... >> narrator:ltimately, both sides uld try to claim neda as martyr for their cause. but how is ordinary tehrani girl became ch a threat to the regime has been a ory much harder to te. it tns out that neda was deeply dissatisfied th life in the islamic republic, antoward the enof her life, she was trying to get away. hesister hoda wrote to us from tehran. >> ( anslated ) she used to say, as we all do and kn, that there's a de, depressing air all over iran. it's evewhere, it's in pele's hearts. we are condemnedo depression. we are condemned to ling without being ableo breathe. >> nrator: the story of neda's death startsith the june 2009 presidentiallection. among neda's fends, skepticism ran hi that they could unseat president ahmadinejad. but en came the country's fit-ever televised debates. overhe course of the night, the president was put onhe defensive. >> ( translated ) he says, "why doyou call me a dictator?" ll, i did not say you are a dictator, but your metd definite leads to dictatorship. narrator: opposition leader mir hossein mousvi gained massive support,nd those who wanted chae felt new hope, among them, neda's friend, delbar tavakoli. >> ( translated i always thout boycotting the election was like saying, "no." is time, i had a different feeling. i was encouraging evybody to vote, either for karubi or moussavi, it didt matter. da wasn't a moussavi supporter. it was a voice of prest, not in support of a rticular candidate, but everye's voice of protest. >> narrator: as a new position movementurged around moussavi, this was nlonger the election foreigjournalists, like scott peterson, had en let in to cor. >> tens of thousands of pele on the stree for their candidate, andor both candidates, in fact. it was an exaordinary build-up to the ection. >> whoo! >> narrator: but f the reformists, thoughts of viory gaveay to new fears. >> jusa few days before the vote, therwas a rumor that swept e text messaging system, and that was tt ahmadinejad's people had imported two llion pens with disappearingnk. and, of coursethe point was that all of these peopleho would turn out to vo for ussavi, their votes would be nullified because, withian ur or two, that mark would disappear and, therere, it wouldn matter. , just something like that-- rumor which is fed by te messages-- meant that almost every sile voter that i saw on vong day was carrying their own pen. >> narrator: eleion day, june 12. both sides turned t in force, even those who'dtayed away before. >> ( translated ) took my id card with ll enthusiasm and went and voted. the evening, when i found o one of my iends hadn't voted, i took her tthe ballotox self and made her vote. >> narrar: but government interference at the poll discourageopposition voters. ne's sister told us neda was among them. >>eda went to a couple of pollg stations and was told thaneither moussavi oraroubi's representatives were present. she ied to vote but sn't able to. >> narrator: oppition supporters said they couldt trust the officials manning e pollg stations. more alarming werehe governmentaramilitaries called basis, who now had been mobilized. >> narrator: late afternn of elecon day, the basiji militia struck, entering moussavi headarters. >> narrar: an eyewness filmed on a camera phone a police tried to remove the basi. but they announced they d orders to shut dn the office. then, a fehours later, another blow to thopposition-- state mea's surprisingly early announcent of a winner. >> the first reports, in fact, ca from fars news, which put up an initial story sang what actual resultsere, and it was ll ahead of its time. obviously, ihad been prepared in advance, anit wasn't long before it disappeared,ut we had thisnitial statement that ahmadinejad was doing ve, very well. >> narrator:ut across tehran, the opposition was procting its own viory. >> narrator: ithe confusion, focus fell othe interior ministry, where the votewere suppos to be counted. >> it was probablyround 10:00, d still some of the polling stations were not t closed, buwe were surprised to see that right the where the mistry of interior building is, which is of course wre they were going to do althe voting and tabulations forhis elecon. they sealed it o with corete. there were three lays of police cars that were alsoined up, and then rt police had been marshaled behind th. >> nartor: what went on inside the interior ministry th night, a whether the votes were fully count, remains unear. but outside,or supporters of president ahmadijad, the election seemed toe over. ( crowd chee ) the ne morning, the official results were broadcast to e world. >> t iranian interior minister sa the election procedures are very clear, and e government's abided by law in all votg stages. >> ( translated ) somehow, tha day felt like the enof everhing. and the worst feing was that i had wittingly helped them gain that litimacy. >> narrator:uch was made of ahmadinejad's main of victory. >> ahmadinejad broke t 1997 record of former preside mohamad khatami, who got.. >> narrator: 63% wasxactly the figure leaked the previousight before the polls had csed. >> mnwhile, mir hossein moussavi has strongly protted the vo, calling it a charade. >> narrator: oneeporter from press tv, iran's state english-languagetation, was shocd at her channel's reports. >> so my colleague callsand he id, like, "why aren't you at work and i just said, "i'm not cong to wk." and he said, "uh, wow, wl, maybe you n come tomorrow, maybe we can get someonelse to do the show today." i'm like, "no, i am really n coming to work anyre, because am not happy with the covera of this neork. i don't... i cannot do ts." >> narrator:aranak quit state in protest, and took to the streets. ( crowd chanting ) >> therowd was getting bigger d bigger. ople from the shs, they just shut dn their stores and joed the crowd. and there were people on the buildings gog like this, hind the windows and stuff, and... or they would comdown. and there were, like, all the old ladies. we were crying. we were, like, "ah, go, go girl!" and then, alof a sudden, this ravan of motorbikes just got into therowd and started ating people. yelling ) >> narrator: a special uniof riot police d been dispatched, trying to ta back the streets. ( screaming ) protestors now tried to film everytng otheir came phones... a sophisticated ne form of resistance. neda's sister tells us nedwas part of the protest. >> ( translated ) neda went to every single demo, allf them. it was ding one of those protests that a woman inlack chador came upo her and said, "my girl, why don't you ess a litt bit more conservatively for these des? because i know the animals. they he real psychological issues and usually go aftethe beautiful ones, and yoare a really pretty girl ( yelling ) >> we were a few girls, d we thought that if we sta on the front ne and start throwing stones, you know, the poce would be more hesitant to oot at airl or beat a girl. little did we kn that we would be the first peoplto get actually attked. ( screaming ) >> all of a sudden, just felt somethinin my knee. it was so painfu that i just blked out, i passed out. >> narrator: fanak had been shot in the lewith a plastic bullet >> the hospil was packed with the injured. i mean, i sathings... it was so distuing, i couldn't stop crying. anthen, i thought that, you know, all these pele were ing to die in front of me. it was so bad. then, myncle's friend just left m and then, someasijis attacked the er of e hospital, and these people a, like, screaming and running away itas so bad. they were with sticks. th actually wanted to hit people who were laying dn on the ground, on theloor, because the wasn't even enough spe. >> i think theegime has been preparing for this f several years, in fact. and i think thate saw the first sign of it back in september 2007, en the new relutionary guard commander announced,o the surprise of many iranians, in fact, th thr biggest threat now was no longer t great satan, the united states, it was longer external teats. but th the biggest threat to the reme, really, was coming fr inside iran. >> narrator:ts legitimacy now in question, the regime brought out its lolists. it was an impressivehow of stngth for a president who claimed overwhelming support and dismissed the prestors as "dirt and dust." >> ahmadinejad is a blksmiths' son, and his, at heart, a socialist. he wanted to bable to help the people, and so an awful lot people, yoknow, voted for him. it'serfectly natural. ( cheers ) >> nrator: nader mokhtari is a coluist for a hard-line newspaper who ames the violencen opposition leader moussavi. >> if had not said the election had beerigged, witht any evidence, substantial idence, none of this would have ppened. that's rabble rousing. we're not going toive iran because mrmoussavi has lied we will not give up ir, becauswe paid such a heavy price to have it, and this i the voice the majority of iranians. >> narrator: it was rning into a r of numbers. the oppositi fought back wit a ssive demonstration through the heart of tehran, the lgest since the 79 revolution, a fa not lost on a former relutionary elite who's turned against the regime. >> what they d't want to accept, they d't want to understand-- this is the pple of iran. like theslamic revolution, thatas the people of iran, as we, like the constitution revolution. this is the marity of the people w wants freedom, who wants demoacy, wants human rights. >> narrar: mohsen sazegara was watching ents unfold on the inrnet, along with millions of other iranians abroad, and posting s own messages of support. >> this is the geration of internet. this is the genetion of globalization era. this is thgeneration which esn't believe in revolutiona ideolo anymore. they wanto live like the other young pele in other countries. theyrefer to be international, to have , you know, conflict with any cntry. maybe ey want secularism, they don't likehe islamic regime anymore, a religious rege anymore. >> narrator: somewhere ithe crowd was neda, alonwith her new boriend, caspian makan. >> ( translated ) there were seven or eight ous in the crowd. we were a bit tired. we sat down to have a rest, d there, for second, i saw them together. i was ally struck to see them there. i realized then this had engulf all the population, cause i knew caspian was not political. >> narrator: so far at day, the protests had been largely peaceful. but outside a basiji militia station, a clashith protestors was becoming violent. >> a bun of peopleust broke away from the main demonstraon of people o were asking for reform and startedttacking this station at the 117th sij statn, a volunteer-force statio with molotov cocktails antried to set it alight. ( guhots ) ( screaming you imagine somee trying to set fire to military base in the midd of london. you know, you can imaginthe reaction frothe security forces. >> narrator: t regime now felt stified using live rounds... screaming ) ( gunshot ) ...andhe country was thrown into even greater uncertaint and chaos. ( gunshots ) ( scaming ) >> narrator: this when, on june 19, at natially televised friday prayersthe nation looked to supreme ader ayatollah khamei to declare himself about the sputed elecon. >> i think that was the firs friday prayers that i actual sat down and watched, l of my life. i think erybody in iran watchethat friday prayer. >> he had good opportunity on that friday to sve the problem. to say, kay, i heard, whatever you nt," but he missed that opportunity. >> narrator: instead, delivered an uimatum to the protestors ( crowd chting ) >> he bacally... he basically said that "i'm giving you e green light to shoot peopl to kill them. just get rid of these peopleho are on the streets." d we all knew that if we didn't go out saturday and protest, this moment would just die out, all right? anit was amazing how everybody came outn saturday again. i mean, i was one ofhem. and i s scared. i me, i had never been this scared in my lif >> ( translated ) neda didn't sleeat all the night before the horrificay. mom pleaded with her not to go out. my mom was really woied. but neda said, "if don't go, d others like me don't go, then who's going to go?" she told momhat she'd try to keep in contacas much as possible to let us kw she's okay. >> nartor: that morning, the basijis were out in force. >> the dayas a really deteining day, because we knew thatomething was going to happen. after khaman's remarks, we kn that he had allowed his guards to open firon the crowd. >> narrato arash hejazi had ained as a doctor, but given up medicine to start a publishingompany. he and his colleaguehad all me into work that day. >> and ixplicitly forced my colleagues tha today, nobody isoing out. nobodyill go out today because it's extremely danrous. so, all a sudden, everybody stood up a said, "we don't care." so thedecided to go out. and i said, "okay, sif you are ing out, i'll come with you because i want to make sure at you do nothingtupid." phone, we heard that there were things going on, ople were in the streets outing, "deatho dictator." anthe shouts were very high. ( gunshots >>arrator: basijis had begun to open fire on protestors ( gunshots ) remarkably, da was caught on camera approaching t protests. she is seen bede her music teacher, gray-haired man in a blue-stripedhirt. >> neda was among thcrowd, was standing there among the cwd where... in front of t rio police. she was there wi an older man, and she was ve close to us, so i noticeher. sometimes, shehouted, "death to dictator" or something, and her music teacher was trng to convince herhat she should stay back, while she didn't, really. she was ry curious. >> shealled twice to sayverywhere was full of special fces. she said there wermany of them. e said it was very dangerous myom begged her to come back. she sa that she would come back, and started heading ck towards the car. ( crowchanting ) >> and when we moved back into the aly, she and her music teacher started waing with us towards the end of the alley n to 15 minutes before she w sh. ( crowd chanting ) >> her unc was the last person o spoke to neda. she told him that she s near her car and would geback soon. but she never got to her c. >> nartor: this video taken the reet where neda died shows basis passing by on motorbikes and protestors throwinrocks late in the day. ( gunsho ) >> that was when we hear t blast d... from in front of us. and i... everybo was just a bit shocked. i asked, "what was tt? was it a gunshot?" anher friend, all of a sudden, told me that "look at thisirl, she's vomiting bod." and saw that she wasn't vomiting blood, was blood gushing out her chest. >> narrator: dr. hejazi trd to stop the bleedin but it was too late ( yelling ) ( crying >> the extent of the blood bleeding, and thpressure of the bleeng, indicated instantly to me thater aorta was shot. and her lung, as wl, because the bloohad been flowing to her nose andouth as well, so her lung w shot as well, and she died verquickly. then, i realized that a crow was pulling someone towas us, and that person was shouti at "i didn't want to kill her". and the shouts... d the people were starting beat him,nd they took off hiclothes and hishirt. ( yeing ) anthey started discussinwhat to do with him. they searcd his body, they took out his wallet,ook out his id card, a started shouting"he is a basiji mber, he is one of them!" they cldn't give him tthe police, theyelieve, because, first all, they would expose themselves, which was extremy dangerouthat day. and also ty didn't believe that theolice wouldn't do anything to hi because the basij is very porful, and he would have easily have got ay. so, all a sudden, in the chaos, they decided toelease him. >> narrator: this idard, confirmed by d hejazi as the basiji at the scene,as later releas onto the internet. it identifs him as a basiji with three-day license to operate in tehran fromhe revolutionary gud. his name and pne number were publisd, too. the nuer has since been disconneed. >> when my father open the door and saw me full of bld, he thought sometng had haened to me, and he was sced. i answered wh short sentences without explaing much. then they turned othe tv, and it was cnn, and we saw tt the film was showing there witme it. >> this is disrbing. i wantveryone to know that. but we have urred out her face, out of respect. but this ipossibly the most seen pce of video out of iran in the world tod. >> at the same tim i realize that, ay, i'm there, my face is evident is gives me some leverage th i can testify for this iident someday. >> narrator: it would ke just a few hours for neda's videoo spread across thworld, and a w days more before it helped transform wod opinion. >> youe seen this video. what's your reaction? >> it's heartbreakin it... it's heartbreaking. and i think thatnybody who sees it knows that there's mething fundamentally unjust about that. >> narrator: the inian gornment admits 11 protestors we killed on june 20. but doctors fromhree tehran hospitals confirmed at lst 34. other bodies we buried by security forces bere they coulbe identified. neda was buriewithout ceremo. when ty tried to hold a merial, neda's sister told us that the authorities prented them. ( translated ) we wernot allod to hold a wake in her memory. we wer't allowed to put up a notice on e local board to announce her death. none of the mosqs would take us, nonef the halls or restauras would give us a ace to hold a ceremony in neda's memory. they wouldn let us. >> nartor: neda's boyfriend, caspian makan, w distraught and angry. he decided tspeak out to sateite tv stations overseas. >> ( tranated ) how did you fi out about the death of ne? >> ( anslated ) my phone rang and the screen sd, "neda." i was expecting to hear her ice, but it was her sister saying she left us. she was taeted deliberately, even tugh you can clearly see she didn't have a stone her hand. i n't know what the iranian auorities have to say about this. do they ve anything to say out this? >>arrator: not long after, caspian caed his friend delbar. ( translated ) i saw s number and awered it. he sounded vy hushed. it was obvious he had his ha next to the speaker so the others wouldn't he. he told me ia whisper, "they are by my house. they have come to get me." >> narrator: caspian w taken to evin prison, although t authorities didn't confirm his arre for six weeks. >> ( translated ) i have not heard what precily they have stated as the reason for his arrest, but om what i have read myself in theews, they are accusing him of sohow being involved in e murder, and is is just not the case. narrator: the regime tried repair the damage doneo its putation and contain the syathy for neda and the otestors. >> ( anslated ) about this woman who was killed, and ama, who shedcrocodile tears for heand the west makes a star out of her, any wise pern who sees this film wld understand is was done by rioters and protestors. narrator: fars news blamed bbc correspondent, saying 'd staged the deathor a documentary. then, they said da was still alive and livi in greece. >> ( translated in this report, were trying to study neda agha soltan's dth from a different angle. >> narrator: in th state television documenta, witnesses were identied and mahed back to the scene of the murder here, neda's music teacheras made to conform his story tohe official version. >> narrator: it was w up to the other key witness whhad seen the basiji at thecene to spk. >> every life, a moment come that the integrity osome rson would be tested, and i alized on that day this was the ment in my life that i had to choose whether to keep self safe or prove my integty. >> pictures ofhe death of neda soltan he appalled people around the world e man who tried to save her has been talking abo what happened. >> narrator: dr hejazi flew the u.k. and went public. >>er blood was draining out of her body, d i was just putting prsure on the wounds to try to stop the bleedin >> narrator: hremains the key ewitness on the recordfor which he's paid a highrice. >> i cannogo back to iran. i know that i have receid threats here, even he, anymous threats, which concern me little bit about my personal security d safety. and that's just cause i talked. i never knew. i've worked literature all of myife, and i always talked about and preached abouthe power of words, but i never realized how powerful wordcan be. >> narrator: sincehe summer, iran's authoritiesave restored an appearance of normaty, with the strictest contro. rough the fall, they televis show trials where reformis supporters were made to cant. ( iling ) >> narrator: then, in octor, the regime tri to script the end neda's story but, instead, neda'mother made a very publistand. ( waing ) e government offered her financial help if she woul blame neda's death on opnents of the regime. all she had to do was to agr to cl neda a "rtyr" for the islamic republic, but she resed. >> ( tranated ) neda died for r country, not so i could ge a monthly income from thmartyr foundation. ifhese officials say neda was a martyr, why do they keep wipingff the word martyr, which people wri in red on her gravestone? >> nrator: like others in is film, delbar tavakoli now lis in exile she landed iturkey, the place where neda and boyfrie caspian makan d met for the first time. >> ( tranated ) that was where they had gotten emotnally involved. but less thaa year on, with all the drea they'd had, one of them isead, another is in prison, and i'here for my part in trying to get t real story out. >> ( translated ) ne loved travelling. and she traveled a lot, as mh she could, anyway. but most oall, she loved turkey. she lod istanbul and she wanted to live tre at some point. neda always said she would lve iran if she had on one day left of r life. >> narrar: caspian was kept in in prison for 65 days, then put under house rest through the fall, until just rently, when he escaped and fledver the turkish rder. he spoke to usrom hiding. >> ( translated ) when was leing, i was taking in everytng in tehran. it was full of people who arso weighed down. it was hard to lve the place where i have lived ally life. i am8-years-old. i love ira i always will love iran. it was worseecause i was about to leave neda's resting ace. i codn't accept neda's death. i cat accept it now. i'm waitinuntil i see her again. and now, a frontline rld ecial report. in aera of global fears about pandemics like hivnd h1n1, weo to the hot zone in uganda and bring you story of dangerous virus that canump ba and forth between humans and e great apes. >> narrator: in the lush untains of western uganda, touristsome to these dense forests in seah of rare and exotic animals. what they n't anticipate is to come in contact with some the world's rarest diseases. that's what happed to an american trist recently who came down with a mysrious and deadly disease aft visiting this cave known for its ba. >>e're still not exactly sure how she acquired the infecon. so we knowhat she did ente to the mouth of the cave, bu didn't go very deep into the cave. >> narrator: a team from t cents for disease control found that she'd conacted marburg rus, a hemorrhagic ver that causes extensive internal beding. hers was the first case toeach the s. >> she would have had to puter hands down. you can imagine, it's t and sweaty. you know, you brush your fac to. to, you know, push your hair back or somhing. thers ways that you can get the virus onto yr mucous mbranes. you can get ry efficient virus infection. we've slowlyieced together thatarburg, this nasty hemorrhagic disease, there geing it from the bat reservoir. >> narrator: during the same period, another oureak of hemorrhagic fever was devastating a mote village in the sa region. it wasiscovered to be a new strain of the ebola virus,hich ientists believe was transmitted to hans who ate infected busmeat. >> narrator: for public heth experts,he ebola and marburg cases in uganda were chiing examples of just howangerous animal diseases could be t humans. >> one of the commonactors that links these emergg and new infeious diseases is that all of them actually srted with an animalomewhere. so what we call thesdiseases is zoonotic seases, diseases that are transmitt from animals humans. >> narrator: ugandlies at the ontlines for diseases at cross the spies barrier; plague, ebola, ahrax, tuberculosis, d hiv all are endemihere. e cdc has made uganda a specl focus for its work. >> uganda is also a reallyood example of a hotspot for where these diseases arise. fections due to animals present 75% of all the emerging infectious diseas, and so iyou're really going to tackle these diseas, you can't just focus on people u need to focus on the animals, youeed to focus on the enviroent and that interface ere those come together to decrease infecous diases worldwide. >> narrator: the bwindi impenetrab forest lies on uganda's southern border. it's home to half of the wor's remaininpopulation of mountain gorillas. we'rheaded into the forest to track a new goria family with dr. adys kalema-zikusoka. she's been studying diases in the rillas for 15 years, and is known as the diane foss of uganda. >> this is wre they nested. >> yes. >> over here? i think at's so special about the great apes is that they' so similar to us. we share over 98genetic material, bothith gorillas and chimpaees. d it means that we can learn lot about ourselves studying them. when you go visit them in the wild, you actuly feel like you'reonnecting. th look at you, you look at them, and there's some kd of connection. 's actually very therapeutic watching them. and the infant gillas are very playful, just like humans; le, when see them playing, i think of my two chdren. ( laughs ) >> narrator: gladys beme uganda's chief vetinarian when e was 26. i've always loved animals, ever since i w little. and then, at t age of 12, i really decided want to be a vet. >> narrator: the bbc even ma a documentary about her rst year on the job. >> this young won's got a fight on herands, but she's dermined to make her mark in a tough world. it's choking her! narrator: nine months into the job as the country'shief vet, gladys was lled to treat a family of gorillasho were sufferg from a troubling new disease. >> gorillaare losing hair and developing white, scaly sk. the baby gorilla had lost alst all it's hair and was very tn. the mother, where she was carrng the baby, had also lost a lot of hr. and the babyas making crying sods, which is extremely abnormal for gorlas. i went and visited a human doctor frienof mine, because they could have pickedt up from people. and she saidt's scabies. >> narrator: scabi is a minor skin infectionor humans, but gollas were naiïve to the disease. for gladys, it was the fir time she saw auman disease jump to untain gorillas with fatal consequences. >> this is a reay good area to show thathere is no buffer zone, and the rest cuts direly onto the hill. so that means rillas come out ten, because they still thin it's still parof the normal range. and that when they get in toh with contaminated items from people. they could even. like there, there's field. they could even st find dirty clothing on a arecrow which is set out to scare wild imals, and then they get si. >> narrator: recnizing this linketween wildlife health and human health marked a tug point in gladys' tnking. >> it made me realize th you can't protect thgorillas if yodon't think about the people livi around the park who have very lite health care. and because we're solosely genetically related, we ca easily get diseases fr each other. the only long-rm and sustainable methodo improve the gollas' health is by improving the alth of the people living around the par and not st the people, but their livestock as well. when we say that there's man health or there's vestock health or there's wildlife health, that... we just made that up. the's only one health. >> narrato dr. william karesh heads the global hlth program at the wilife conservation society. >> there'sust a tiny peentage of diseases that only afct one group. so when we eradicated smalox around the world, thatas a simple o because that's one of the few diseases that only affects humans. >> narrar: he says the most fficult diseases are the one we share. we want to work upstream. if animals a the source of disease,e want to break the chain from people getting . if people are the soce of the disease, we ed to break the chain going that directi. and it really does play ouat the local level. until you get it othe ground, like gladys is doingit doesn't really mean anythi. >> narrator: we've come to small village ne the forest boundary, where glad has gathered the community to tch drama play about tuberculosi a seriouproblem in uganda. >> this is showing a good family ana bad family, so that the bad family, like, thw rubbish next to the rden, and defecated, and theorlas came and waexposed to this. so then, the good family, ich is a man dreed as a woman, came in ancleared everything up and told th off. narrator: high tes of hiv/aids and little avaible health care leave ople highly susceptible to infectious seases like tb. simple hiene education can help. >> so this is a faly, they are dirt some of them don't have shoes. >> narrator: but gladys so finds volunteers to ther samplefrom villagers with chronic coughs... >> so says he's been ughing for about fi months. >> five months. >> yes. >> narrator:..and makes sure that those that testositive for tb follow througwith the full crse of treatment. there'a problem with the local cattle, as well. they carry atrain of bovine tuberculos, which can sicken humans who dri infected cow's milk. these cows could carry tb a pass it on to the mans, which would be a b shame in this communit because we're impring the health of the community. a green one. hurry, please. so we're going to rry out tb testing with the sampl. and if there is y cow that has tb, unfounately, it has to be euthanized. >> narrator: she's doi all this because she kno how easily this disease cod jump to gorillas. so, we give 10 mil or 20? if the gorlas got tb, it would be a disaster. tb requires day treatment every day r eight months, and its impossibleo do that in the fore setting. it's easiefor people to get that. i'm just trying to recorall the gorillas we've sn so that, by the end of the vit, i can tell iwe've seen all the gorillas ithe group. we're developing an early warning system for disease tbreaks. if wcollect fecal samples gularly, then when there's a outbreak, we'll be able tell what's different and bmore informed andive a proper treatment. >> narrator: what began decade ago for gladys, as an understanding that animal an human health a tethered together, has beme a new policy for oanizations like the cdc. >> we think one health as not just aut human public health; onhealth is about human and animal publihealth and, incrsingly, what the strategy is telling us is we need tbe working more csely in an ingrated manner with the animalublic health field. >> it's like a comfortg sound, so trying to be resured about everybody arou him. >> narrator: in bwindi, glys remains rried. disees far worse than tb have caused mor die-offs in other primate populatis. in the con basin, wildlife experts estite that more than 5,000 lowland gollas have died ofbola over the past decade. >> in congo-brazzaville, ty've had people dying of ebola o ate gorillas tt died of ebola. theyere very encouraged by what we're doi in uganda. and so now, they're tryingo bring the wildlife authories together with the publ health authorities to address tse issues >> narrator: health authories are also concern about the further spread of these emging diseases. >> once upon a time, it woul have taken ds, weeks, months, to go fromne continent to another coinent. nowadays, within 24 to 48 urs, you can trel from one place to the other place, a still be incubati the disease. so its very easy to trsmit diseases worldwide >> sometimes, itets frustrating when youe trying to promote conservatn. there's so many other pressi issues. t what gives me hope is that by promoting conservatn, we're improving community publ alth around a very remote ar of uganda. so i tnk we're done here. we can head back >> explore frontle's web site for re eyewitness accounts of thprotests in tehran. >> ( trslated ) she used to say that there's a dea depressing air allcross iran. >> ...andriends' and family's memories oneda agha soltan. >> ( tranated ) neda attended every single one odemo, all of them. >> and check out the indendent reporting and commtary on ir in tehran bureau, our new online parership. and from frontline wod... view history of how diseases have spread over the pas century. and see what health expes are saying about how to preventhe xt pandemic, and much more. then, join the dcussion at pbs.org. >> next time on ontline... for 30 years americans have played a game wi the banks. >> changing the terms, raisi terest rates, changing the rules of the game. >> withhe banks holding all the cas. >> the industry ga half a billion dollars to congress? now, the government has shuffled the deck. >> se common-sense reforms... >> but are the cards stil stacked? >> we keep praying they' going to pay us mething that's going to help me, and it never happens. >> "the card game." watch frontline. captioned by media access oup at wgbh ccess.wgbh.org frontline is made possib by contributions to your p statn from viewers like you. thank you. th additional funding from the pa foundation. majofunding for frontline and fronine world is provided by the john dand catherine t. macarthur undation. committed to building a re just, verdant and peaceful world. frontline world is made possible by shellsupporting people of the ess... >> as you can see,eople are gathering around. >> ...and t independent journalists... >> how do you reond to these charges? >> ...who tell the sties of our time. anby the skoll foundation. with additional fundg from scott fearon. >> this is pb