the right ♪ this is "nightline." >> tonight, the heart of nub ba. a lone doctor in one of the most dangerous places in the world. performing every surgery -- >> everybody's life is valuable. we can't lose sight of that or else we leets our humanity. >> cheating death at the hands of a dictator. why he says they can't scare him away. >> a bomb hit here right behind my house. i think they're probably targeting me. plus the boombastic duo. ♪ their new collaborative album. inside their fast friendship and trash talk. >> i understand there's a little bit of competition over who has more grammys? >> oh, there's no competition, really. >> why bring that up? >> the inspiration for the

reggae sound in their new songs like "don't make me wait." ♪ don't make me wait >> first the "nightline 5." as an allergy sufferer, you're wired differently. nasocort is different. it's designed to target and inhibit more of the allergic inflammation that causes your congestion and other nasal allergy symptoms. by stopping more inflammation, nasocort gives you more effective relief so you can breathe easier for 24 continuous hours. nasocort, stops more of what makes you miserable. guaranteed or your money back. >> number one in just 60 >> number one in just 60 seconds. >> number one in just 60 seconds. ♪ ♪

get high speed internet from at&t. $30 per month. no extra monthly fees. more for your thing. that's our thing. visit att.com/internet. good evening. thank you for joining us. tonight we meet an extraordinary doctor who is caring for an

entire region in sudan on his own. as bombers terrorize families in a brutal civil war, he works tirelessly to repair the damage, risking his life to save a peaceful people. abc's linsey davis has the story. a warning, some of this footage is disturbing. >> reporter: it's the kind of fear that few in the world could ever understand. planes flying overhead. dropping bombs all around you. that fear is reality for these children and their families in the nuba mountains of sudan. and there's only one doctor in the whole region to save the dying and treat the wounded. >> he's got shrapnel through the chest -- >> reporter: dr. tom katina in

charge of mother of mercy hospital. >> everybody's life is valuable. and we can't lose sight of that or else we lose our humanity. >> reporter: where every single day he treats hundreds of patients. >> the lives of people here matter as much as anywhere in the world. >> a piece of shrapnel in his liver. >> reporter: ten years ago this american surgeon left his family and friends to live in africa, in a location so dangerous no other doctor in the world lives there. >> the guy that goes to a town, sets up a practice, stays there for 30, 40 years, i always thought that was the coolest thing. i've always wanted that as a doctor. i like the idea of staying in one place and becoming part of the community. >> reporter: for three weeks in 2014, and again in 2015, phil maker, kenneth carlson, captured heartbreaking scenes from dr. catena's daily life for documentary "the heart of nuba." >> happens to be one of the greatest travesties that no one knows about, no one talks about.

>> reporter: the area is extremely isolated. with the government banning journalists and international aid to the area. since 2011, the president of sudan, omar hasan al bashir, has been waging a brutal war against his own people. >> omar hasan al bashir, genocide, he lost control of the southern part of sudan so he has this desire to get this part of the country back because it's naturally resource rich. >> he's willing to kill his own people so that he can have the land? >> that's right. this is all a program to discourage, to oppress these people, and to push them out of this region. >> reporter: dr. catena says he's treated more than 2,600 people who are victims of al bashir's carnage. carlson documents the reign of terror and how dr. catena and the nuba people have turned the hospital into a symbol of their survival. we recently spoke with dr.

catena via skype. >> in the operating room, we did 15 operations -- >> why sacrifice so much for so long? >> it's a good question. i think -- i think i take my role model as jesus christ. i think christ is really calling us to get rid of it, get rid of our baggage, whatever it is. i still have this drive and this zeal. god willing, as long as i have the strength and energy to carry on, i'd like to keep doing it. >> what is it about dr. tom? >> dr. tom is as close to a saint that i've met on the face of this earth. every morning he wakes up at 5:30, no alarm clock, after being woken up the entire night. >> he's always on call? >> always on call, no one else there. >> reporter: carlson and dr. catena attended college together, brown university, class of 1986. catena traded his degree and high-paying job offers to fulfill his calling to be a doctor. >> my brother felix, i feel i

should go to medical school. he's like, what are you talking about, you're an engineer, what are you talking about? no, i think i should do it. >> we've got dr. tom. how he came, i don't know. from where he came, i don't know. i call it a miracle. >> lower the table a bit. flush out wound to leg, open fracture. didn't heal. i learn most of the surgery on the job. i was in kenya for eight years working with a lot of different surgeons and did over 2,000 operations there. this one i had to learn from books. >> how is he doing it? because it seems like he's, as one of the women in the piece says, he's the physician, the gynecologist, the surgeon, he's all of that. >> yeah. he is, as we say, the last line of defense. he has to do it all. and that's a huge onus on him. he has very view vaccifew vacci difficult work.

>> reporter: he treats everything from measles to cancer to war wounds. even cares for a village of people suffering from leprosy. >> the truth is, it is contagious, but it is not highly contagious. it's very important to touch these people. they're part of the human race like anybody else. >> reporter: some of the toughest cases involve children, like 2-year-old baby rita. >> rita has a pediatric tumor of the kidneys. we've given her several courses of chemotherapy to reduce the tumor but the tumor remains we have to take out this whole kidney and part of this kidney, then we'll see. i don't know. if we don't do anything, the baby will certainly die from the kidney tumor. very difficult operation. it's a long shot. >> reporter: carlson's cameras are rolling as dr. catena removes from tumor from baby rita. the surgery is long. >> see that white part? that's the tumor. >> reporter: and grueling. >> gently, gently -- don't pull, okay? >> reporter: but miraculously a

success. >> we'll tell her it went well, she has part of the kidney left, and the rest is in the hands of god. >> reporter: saving lives like rita's is part of what keeps dr. catena from leaving. >> i knew if i left, some people would die. not that i'm a magician, but there's certain things i can do that some of them will survive, that's a fact. so by leaving, that to me says my life is more important than other people's lives. which i don't agree with. i just think it's wrong. it's wrong thinking. so let me stick it out with these guys. if you got shelled, let's see what we can do. i'm all-in. >> reporter: sticking it out means living with the real threat of aerial bombardment. >> it's passing over there. and this one drops barrel bombs. >> they know when they fly overhead, they're frightening people, they're scaring people. >> reporter: bombers often hit targets very close by. the hospital itself has largely been safe, but cameras were rolling when all of that changed.

>> the feeling is one of just intense fear. there's no other way to describe it. >> here it comes. >> reporter: dr. catena captured one of those attacks on camera himself. >> down, down -- >> reporter: the bombs just missed the hospital. >> as you're waiting, that moment, everything becomes crystal clear. you're just waiting thinking, is this the day i'm going to die? is this going to cut me in half and finish me off? a bomb hit here, which is right behind my house. here's the fence that was destroyed. you can imagine if it hit here, i think they were targeting me, aiming for my house and they just missed it. >> reporter: in the three years since the film's production, the bombings have stopped. the break in the fighting tied to the united states' lifting of

financial sanctions against sudan. >> we've not been bombed in over a year. i'm very thankful for that. >> reporter: dr. catena has continued to make a life for himself in nuba. >> take this ring -- >> reporter: two years ago he married a woman named messima who was also a nurse at the hospital. he's also training others to become doctors and nurses to continue the work he started. so can you sum this up and say simply that you are just doing god's work? >> yes. i would say that's the simple answer. if i can go to my grave despite all my limitations, my faults, everything else, if i could say, you know what, i think i did god's work, i think i would die a happy man. that's my goal. >> reporter: for "nightline," i'm linsey davis in new york. next -- ♪ message in a bottle >> send a message in a bottle. the legendary sting now teaming up with rapper shaggy on a reggae album. how this unlikely duo came together.

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(sound of footsteps) (sound of car door opening) (car door closes) (sound of engine starting) ♪ ♪ it might surprise you to learn that legendary singer/songwriter sting and popular rasta rapper shaggy have common roots in jamaica, where sting wrote some of his biggest hits inspired by the native reggae sound. in you it's formed the basis of an unlikely collaboration. here's my "nightline" coanchor dan harris. >> we're like the magnificent two. we've just arrived in town. >> reporter: the pop legend sting and the jamaican reggae star shaggy have become close friends.

♪ >> this is where you get your grows reese? >> take a basket up. >> reporter: here they are together in the quiet suburbs of new york city near shaggy's personal recording studio. >> this is the most unusual thing. >> are you sting? >> afraid so. >> you're going to be embarrassed because that's shaggy. >> that's shaggy? shaggy! somebody take this! somebody please! >> reporter: the two came together to collaborate on a new single. ♪ ♪ don't make me wait >> reporter: "don't make me wait," blending genres of rock and reggae for a fresh new sound. ♪ true love true love ♪ it didn't take me long to fall in love with your mind ♪ >> not a pairing i necessarily would have seen coming. how did it happen? >> were you surprised? >> i'm a little surprised. >> that's the intention. >> that was our intention. when you choose the kind of music you're going to do next,

you want to surprise people. this pairing is odd but when you hear the music, you will be surprised again and then you'll think, well that isn't so surprising. because they do blend together. in a very remarkable way. >> the early police records, you know, had very heavy reggae influence. ♪ roxanne >> reporter: like their massive hit "roxanne." ♪ you don't have to put on the red light ♪ >> reporter: and the driving pulse of "message in a bottle." ♪ message in a bottle >> reporter: shaggy has sold more than 20 million albums worldwide. ♪ including "boombastic" in 1995. >> this is our studio. in this very room, i've produced all my hits. all these records. >> i would have thought that would have happened in jamaica. >> no. the thing about doing it in jamaica is, it is such a relaxed place that i'm not going to want to work. you know what i mean? i'm going to want to be on the beach. smoking. >> yes, smoking.

>> reporter: the two were brought together through a long-time friend and music industry executive. ♪ ♪ don't make me wait >> reporter: their initial jam session turned into a whole album. >> he said, by the way, sting is combing over. i'm like, pfff, whatever. he walked in. shaggy, so a hit record, produce me -- >> this is you imitating sting? >> yes, me imitating sting. >> it's not a very good impression. >> he was like, show me what to do. and i was terrified. this is 100 million selling guy with 16 grammys, you know. but he was -- like a kid in a candy store and that connected me. >> how much trash talking is there? >> a fair amount. >> i was going to deny any. but you know. >> i understand there's a little bit of competition about who has more grammys? >> well, there's no competition, really. >> why you got to bring that up? see, i only have that one right

there, right? >> how many does this guy have? >> he doesn't know. >> 16. >> innumerable. >> 16 or something like that? >> it doesn't really mean anything. >> easy for you to say. >> easy, very easy for me to say. >> it's obvious to me having been around you guys for a very short period of time that you do get along. >> oh, yeah. >> and you can't fake that. and you can't even engineer it, either. it's just kind of luck. >> yeah. it is. it's almost like the universe is driving us. and even making the ol balbum itself, there was no time we really argued about anything. we're always in the ballpark. when there's anything, the compromise is really simple. >> reporter: it was a little harder to compromise on their creative process. >> it was the first time i made a record where i got up in the morning, i went to his house for breakfast, and we start work like any normal office guy. never happened to me before. normally my process is, we start at 2:00 a.m. in the morning.

by the way, early? i'm always on time. this right here? that's the next level. >> i was a milkman's son, he'd get me up before school to deliver milk. >> if we're supposed to be downstairs at 5:00, he's from there 4:00. that's weird. i'm just letting you know. okay? i'm just letting you know. i said, yo, sting, i'm a military man, i'm always on time. we "well, if you're on time, you're late." just fyi, weird. >> he's not fighting back so i assume -- >> because he knows. >> it's ridiculous. >> he knows. >> punctuality is the gift of kings. >> reporter: the new album's title, "44/876," a nod to sting and shaggy's respective country codes. the lyrics are filled with political undertones like the song "dreaming in the usa." ♪ you're dreaming of the usa it's never easy you're looking

for another way ♪ >> we're both immigrants. he's from yeah make character i'm from britain. and we came here because we love this country, because we value what this country represents. we both feel that those things we value about america are under threat. so it's really a love letter to the united states. >> reporter: the message, a departure from sting's iconic love song and shaggy's highly sexually suggestive hits such as "it wasn't me." ♪ it wasn't me i even had her am the shower it wasn't me ♪ ♪ she even caught me on camera it wasn't me ♪ >> this guy's put out pretty racy stuff in the past. >> who, me? >> really? >> wasn't me! >> exactly, exactly. >> they're moral parables, you have to listen very carefully. >> that was said with nothing but respect. seriously. but this album has some very sunny messages. >> people need a smile. people need a sense of wanting to get up in the morning. feeling that things can get better. the first level is to entertain.

and then inform underneath that. >> this is when i was in the u.s. marines. i fought in the first gulf war. the values that we're fighting to protect, you know, are values that i fought for. so if i see it's threatened, i mean, i have something to say about that. >> reporter: both artists are long-time philanthropists. for 17 years shaggy has been donate going raising funds for the only children's hospital in the capital city of jamaica, kingston. >> i invited sting down. to come and sing. to raise money for them, their sixth installment. he came. we had 15,000 people. and we raised close to $1 million. but it was sting's first time playing in jamaica. >> i heard a lot of my successful songs in jamaica. i felt i had some kind of debt and this helped me feel like a token gift of thanks, really, to the island. >> reporter: a debt he is repaying to the people of jamaica and to music fans

everywhere. for "nightline," this is dan harris in new york. >> our thanks to dan. and we'll be right back. you ok there, kurt? we're about to move. karate helps... relieve some of the house-buying... stress. at least you don't have to worry about homeowners insurance. is get to know geico. and see how easy homeowners and renters insurance can be.

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>> are there things that you know but haven't said that could damage president trump? >> james comey. >> to those who say you should have brought hillary clinton before a grand jury? >> the exclusive interview everyone will be talking about. >> was president trump obstru obstructing justice? should donald trump be impeached? >> stephanopoulos. comey. this sunday night at a special time, 10/9 central on abc. >> thank you for watching "nightline." and as always, we're online 24/7 on the "nightline" facebook page. thanks for the company, america. good night.

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