tonight on "nightline" -- swimming with sharks. who goes out to hunt for great whites lurking off america's shores? these guys. and just a few days after a shark terrified a kayaker and left beaches closed. with with them this morning, when they saw another one. plus, this smoking baby sparked viral outrage and an abc news investigation into an epidemic of chain-smoking children. tonight, a confrontation with the american company -- >> you really think it's okay to have this -- >> and what's from it. and revenge of the nerd.

mark zuckerberg got the girl but many of silicon valley's brainiacs go to this woman for help. and we follow her as one bachelor goes for love. >> good evening. i'm cynthia mcfadden. tonight, we begin with a shark encounter that's ramping up the fears of beachgoers on some of the country's most popular shores. the dramatic image of a dorsal fin slicing its way towards a terrified kayaker near cape cod made headlines this weekend. so we sent abc's linsey davis out with the guys who track great whites for a living. and can tell the rest of us how safe the waters really are. >> oh, my. 11:00 o'clock.

floaters -- shark! there he goes. all right. >> reporter: greg skomo isn't hunting great white sharks to kill them -- >> you see him, nick? >> yeah. >> keep an eye on him. >> reporter: he wants to learn more about them. he's tags these predators to understand their behavior and that's what's brought him here just off the coast of new england. and in the last 48 hours, he's tagged two of them, not far off the beaches of cape cod and is expecting more. >> it's amazing. if you told me four years ago that we were able to tag that many white sharks, i'd say, no, you're out of your mind. but thousand we do it. we went out yesterday, broke the ice and continue to tag for a month and a half. >> reporter: early this morning, we joined skomo and star of "shark week" cape cod.

this is the instance walter zolts jr. realizes he's being followed, stalked by a healthy are 12 to 15-foot shark which may or may not have been a great white. you've seen the picture everybody is talking about. the alone kayaker, the shark behind. >> we're not 100% it's a great white shark, based on the fin shape itself which is remarkably similar. >> reporter: but there is real concern among some experts who are seeing evidence of an uptick in great whites off the east coast. >> i've been telling people for 27 years not to worry about sharks. not to worry about shark attacks. now, i'm advising towns when or when not to close beaches. >> reporter: but skomo questions movies like "jaws" with a mechanical white shark have given great whites a bad rap. >> we often think of sharks as

killing machines. that's not what they are. we're actually killing them at a far greater pace than they're biting us. >> reporter: they don't actually hunt humans but what makes them potentially dangerous are these little guys. the seals that have returned to the waters to feed on. that's the big attraction to the sharks? >> there they are right there. you'll see lots of them. >> reporter: conservation efforts have led to a gray field baby boom of sorts. the population has grown from approximately 10,000 to 300,000 in this area since 2008. looking for seals, the great whites may come too close to shore and mistake a person for their favorite meal. >> and the image it sees, a person on a surfboard or a person underwater mimics the seal and the shark makes a mistake. unfortunately, it's a fatal mistake for the person in the water. >> reporter: but what most people fear about great whites is what draws skomo closer to one of nature's efficient killing machines. >> their anatomy.

the way their built. they're a fast, efficient big shark. they can elevate their body temperature. they've got excellent eyesight, other senses that are quite keen. really is a natural-born predator. >> reporter: skomo and his team came here to search for great whites on the upcoming show set to air next month on discovery. this morning when we were with them, the team spotted one. they saw it from the air. the massive frames make it difficult for sharks to hide. at first, it was touch and go. the plane spotted the shark twice and then lost track of it twice two times then on the third site o.. so mission accomplished. he turned around and rammed the boat. right now, they're trying to get close-up pictures of the shark. while they may get angry, they rarely attack. in 2011 there were 26 attacks reports in all of north america. still, great whites are the

largest predatory fish on earth. they grow to 15 feet in length. weigh up to 5,000 pounds an those razor-sharp team, up to three inches long. about 230 in all across five rows. >> they're survivors. they're amazing animals. they're unique animals, and, you know, i'm infatuated by them. >> reporter: greg's fearless love for sharks is not just academic pursuit. it's this dangerous adventure as this 18-foot great white attacked. >> it's up -- whoa! >> that was unbelievable. >> reporter: you have two young kids? >> yeah. >> reporter: would you let them swim out here? >> right here? no, i would not. we're in a remote area, not a lot of people are here right now. but we can see all around us large numbers of seals. the sharks are here to country the seals. do i want my son running into

the water with his boogie board? no. >> reporter: so this morning, with no seals in sight, sunseekers just a few miles away were willing to take their chances. i'm linsey davis off the coast of massachusetts for "nightline." well, the 25th anniversary of shark week kicks off on the discovery channel august 12th. thanks to linsey davis. next up, this baby-smoking video led to outrage. and led our reporter to confront a company of profiting from kids. s. i was worried about 'em, you know? i mean for instance my mom went to bed tonight before making my dinner. which is fine, i mean i, i know how to make dinner. it just starts to make you wonder. is this what happens when you age? my friends used to say i was the lucky one. i had the fun parents. where's the fun now? night guys!

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chain-smoking toddler caught the world's attention with a viral video of him puffing away. well, it seemed like a one-off spectacle in his home country of indonesia, it's completely legal for kids to buy and smoke cigarettes. abc's dan harris decided to confront one american company accused from profiting from this lack of regulation. so tonight, "nightline" investigates. >> reporter: 17 million people have logged on to watch this video of the so-called smoking baby. a 2-year-old chain smoker. but the millions who saw this video probably didn't know is that this child is actually the tip of the iceberg of an astonishing youth-smoking epidemic in his home country of indonesia. are you aldi? hi, i went there last year where i met the smoking baby whose real name is aldi. this is some sweet glasses got here. i like that.

and who promised me he'd quit cigarettes. but i also found something horrifying here. after the popularity of the smoking baby there's been a mini explosion of imitators on youtube, including this 2-year-old. watch him light up with the help of his own grandfather. >> i can't believe i'm breathing in a baby's cigarette smoke. >> reporter: critics say the explosion in youth smoking is being fueled in part by one of america's most profitable corporations, philip morris international, the worldwide seller of iconic brands as marlboro. why do you like marlboro? >> because it's the best. >> reporter: it's the best? >> yes. >> reporter: my team set off for a year-long search for answers from philip morris international. which took us to two continents. here we go -- gentlemen -- and culminated recently in a confrontation with one of the world's mightiest ceos. do you really think it's okay to have this? more on this.

what we learned since pmi started doing business here, the youth smoking rate nearly doubled. running tv ads sending squads of pretty girls out to hawk tobacco and resurrecting the marlboro man. with the company under massive public pressure, retired in america long ago. do you think the marlboro man is cute? >> oh, yeah, don't you think? >> reporter: most importantly, we found it right near schools. this really brings home the point. this is an entrance to the school. come with me. just a few steps waugh from the entrance there is this kiosk sponsored by marlboro. anyone, including kids, can buy individual cigarettes for a dime. when we first broadcast these images ten months ago, we repeated asked pmi for an interview. i'm from abc news, we're looking

to interview somebody from philip morris national. but they refused. so a few weeks ago, we showed up uninvited at their annual shareholder in manhattan. at the meeting with the ceo of pmi louis kcamilleri at the podium, i stood up. how do you defend that? >> the kiosk you mention, we actually looked for it and we couldn't find it. >> reporter: excuse me, gentlemen, are you comfortable with pmi marketing outside of schools? after that, we talked to people who are in the meeting. right in the one of our interviews right there, we saw ceo louis camilleri walking by. do you really think it's okay to have this? >> no. >> reporter: you don't think it's okay?

>> no. why then is it still there? we broadcast this on television? >> i can i answered that. i said no. >> reporter: you didn't ask me for the address today? but we broadcast it ten months ago. >> we've asked for the address, we couldn't find it. >> reporter: you did? why didn't you ask me back then. >> i don't know. >> reporter: he says that pmi does not market to children and it making changes like tv in indonesia and asking them to pass a bill to restrict youth tobacco marketing. are you able to sleep at night, do you feel you're doing the right thing? >> i feel we're doing the most responsible thing in indonesia. we've been very vocal advocates for restrictions. >> reporter: so you're comfortable with all the steps you're taking, all the marketing? >> it may not be perfect, but we've certainly done a lot of things voluntarily that others have not done.

and you know that. thank you. >> reporter: back in indonesia, shortly after our confrontation with the head of pmi, the companies finally took down those ads on that kiosk outside the school. nearly a year after we first told them about it. for "nightline," this is dan harris in new york. >> our thanks to dan. and just ahead, the rich but lonely bachelors of the silicon valley, and the woman teaching them how to get a girlfriend. ow" "now this would definitely be the car i would want to get." like the fusion? "we love the fusion." mileage matters? "absolutely." up to 33 miles per gallon. the sync system. you can take all the music and put it into the hard-drive. he just got a glimpse of some 21st century technology and he's flipping out. don't miss the ford summer sales event. get a fusion with 0% financing for 60 months plus $1750 cash back. now at your local ford dealer. serving up fords...with everything on them.

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facebook founder mark zuckerberg may have taken himself off the market by getting married, but silicon valley is still full of high-paid, brainy overachievers struggling to get a date. so who do they call for help? here's my co-anchor bill weir. ♪

>> reporter: out here in cal, where the city girls hike the hills of san francisco, and the valley boys create the next best thing, out here in the tangles mass of innovative energy lives sundar. he's got a ph.d. at stanford. his turn-ons are ball room dance, recreational math. >> people who are creative intellectual will captivate you for a longer time. >> reporter: sewed ladies in north california must be lined up around the block and dream about making babies and splitting stock, right? >> i tried match.com and eharmony, not so much. >> reporter: backed with brainiac billionaires, but revenge of the nerds won't entirely be until these millionaires find love.

and that is where amy anderson comes in. >> i think when people initially visualize that silicon valley guy, they picture mini bill gaits running around with coke bottle glasses, maybe pocket protectors, totally clues around women. there's definitely some of those, let's be honest. >> reporter: a dozen years ago she realized that the dotcom boom created a lot of very successful and very lonely guys. >> that kind of analytical mentality doesn't necessarily compute over into the dating world where emotional intelligence is really whether or not. >> reporter: meanwhile, southern california was crawling with attractive women. thus, linx dating was born. amy is hooking him up. and she'll do even more if he wants to pay a lot more. what do i get for 50 grand, if i

want the platinum service? >> i would do date consultation. for instance are, he might show up in the first date in a really shiny sports car, so my advice for these guys, and this has happened so many times is to rent a car, barrow your buddy's prius or honda, if you're with a woman, she will be with you for the right ones. >> reporter: on this side for sundar, amy has chosen her. they have similar backgrounds. >> we've done a lot of modeling of the brain. >> reporter: and their first date is filled with moments of quirkiness. >> and i built a robot and my robot fought somebody else's robot. >> reporter: proving once again, you can't overthink romance. so why are you better an eharmony or match.com which some of your clients actually helped to design? >> no, they have, actually. it's really different.

because a computer can't whisper in your ear and say here's a history to your match, and this is what you should wear. it's really that personalized approach which makes this incredibly unique. >> reporter: maybe she's right. maybe even in silicon valley, love is proof. >> the next is about three light years away. >> what's that? >> to take care of palmpilots. >> reporter: ani and sundar are cautious after the first date. >> that doesn't mean she's completely -- >> reporter: after eight dates, sundar and ani are now just friends. hunt, whether it's high-tech or low, continues. >> ahh, the search for love. our thanks for bill weir. thank you for watching abc. we hope you'll check into "good