>> narrator: tonight... t our deliberations are more partisan than at ae that i can remember... >> narrator: the life and politics of a maverick... >> john mccain fused together two almost opposing concep. he is all about duty and he is all about dissent. >> narrator: ...and wh tells us about america today. >> in some ways, mccain is ar pion the politics i think we're going to get, and in some ways i think he's the last ofng breed of somete're losing. >> narrator: tonight on "frontline," "mccain." >> frontline is made possible by contributions to your station from viewers like you. thank you. and by the corporation for public broadcasting. major supporis provided by the john d. and catherine t. macarthur foundation, committede to building a ust, verdant and peaceful world. more information is ailable at macfound.org. additional support is provided by the abrams founda committed to excellence in journalism. the park foundation, dedicated to heighteningublic awareness of critical issues. the john and helen glessner family trust. supporting trustworthy journalism tt informs and inspires. and b

of the... >> narrator: confrontation... >> the deep dysfunction... >> narrator: and ideological purity replace collaboration. for mccain, washington was an increasingly difficult place. >> mccain is one of the last of the giants in the senate who has an independent identity that is separate fs party and it's hard to imagine whether there can be another one these days. the system doesn't encourage independent thinkers and mavericks.ge people wilpunished for that. >> sad and shocking news about senator and former presidentiajo candidat mccain... >> doctors found the tumor... >> narrator: last summer, even as he was diagnosed with brain cancer, mccain was again the center of attention. >> that much anticipated vote on health care that is still too close to call... >> narrator: as he voted against the president's at repeal obamacare... >> no. (gasping, light plause) >> narrator: ...and stood up to deliver a message to his colleagues. >> our deliberations today are more partisan, more tribal, more of the time than at any time i themember. and right now th aren't producing much for the ameri

>> narrator: tonight... >> it was the hostile takeover of the republican party. >> narrator: the fight betweent the presidend his own party. >> in one fell swoop, the republicans sent a message, "you're not a king, you are a president." >> trump's response is classic trump, "who am i going to blame?" >> don't mess with donald trump. donald trump doesn't forget. >> somebody needs to stand up and say, "this is not our party, this inot normal." >> tonight on frontline' "trump'takeover". >> frontline is made possible by contributis to your pbs station from viewers like you. thank you. d by the corporation for public broadcasting. major support is provided by the john d. and catherine t. macarthur foundation, committed to building a more just, verdanf and pe world. more information is available at macfound.org. additionalupport is provided by the abrams foundation: committed to excellenc journalism. the park foundation, dedicated to heightening public awarens of critical issues. the john and helen glessner family trust. supporting trustworthy journalism that informs and inspires.ro and by t

>> narrator: in the senate, the bill was in trouble. majority leader mitch mcconnell was in charge of getting it passed. >> mitch mcconnell's the master. you know, i mean, he understands the rhythm of the senate. he has been in that body and in elected politics for a very long time, so understands how to get something done in a legislative arena. >> narrator: mcconnell had spent more than three decades in the party establishment,g earnreputation as a deal maker and fixer. >> a senator once jod to me that if you had to call a friend and needed to bury a body, mitch mcconnell the friend that you would call who would help you and never bring it up agai but might need a favor fromou years down the line. >> narrator: but with only a razor-thin majority in these te, mcconnell was struggling to keep the repeal bill alive. the crucial vote: john mccain. keep in mind, this is basically two years to the month after president trump had criticized mccain's p.o.w. status and suggested he was not a hero because he was caured. >> narrator: recently di

narrator: the u.s.designated terror g group, based in somala, was responsible for the september 2013 attack on the westgate mall in nairobi that killed 67 people, and for the death of over 140 in the april 2015 attack on kenya's garissa university. nir kalron investigated the links between al shabaab and illicit ivory trade in 2012. kalron: al shabaab was controlling the ports of kismayo, marca, and big parts of mogadishu, including access to the port through its agents. evidenence from kenynya suggests the local and regional poachers used that access. we'd seen evidence from ports in marca and kismayo of ivory, large stocks of it, and had collected evidence from individuals that testified to having profifited from thahat te withth al shabaab b agents. knights: al shshabaab did contrl various ports in somalia where the ivory is being shipped out of, and they would basicallyly charge a tax for anything being shipped out. narrrrator: al shabaab levies a% to 7 7% tax on i ivory that t ps ththrough areas th

narrator: the town of baker lies on the i-15 corridor. baker is famous for having the world's tallest thermometer, erected to commemorate the world record temperature of 134 degrees fahrenheit set in death valley in 1913. but for biologists, baker is increasingly famous for something else--ravens. the area around baker is flat and barren. it would never support a large population of ravens. the town itself has fewer than 800 residents, but thousands of people stop in baker to refuel both their vehicles and themselves. and that's where the trouble starts. mullen: they've got these great, you know, fast-food restaurants, and they've got dumumpsters and all kinds of things that, you know, ravens thrive on. narrator: truckers and travelers routinely leave food remnants for the birds, and they are quick to take full advantage. inquisitive and highly intelligent, r ravens have leard to recognize anything that looks like it might be a meal. as an experiment, we left an empty to-go container in an area frequented by ravens. [bell dings] it took l

ical music) - [narrator] the past 70 years has been the era of pax americana. - this new structure of peace is rising up on strong foundation. (cheers) - mr. gorbachev, tear down this wall. (cheers) - [man] three, two, one. (energetic classical music) - [narrator] a period of relative stability thanks to the influence and ballast provided by the united states. (energetic music) washington's grand strategy of promoting democratic values while backing it up with military might, has been the dominant strategy since world war two. but with renewed russian aggression, and a rising china, is it showing signs of strain? pax americana, the american peace, next on great decisions. (energetic music) - [narrator] great decisions is produced by the foreign policy association in association with thompson reuters. funding for great decisions is provided by price waterhouse coopers llp. (dramatic music) - [narrator] world history is marked by the rise and fall of empires. some remembered as periods of stability and progress, others for turmoil and war. - [man] this was the great fire in the city of

(suspenseful music) - [narrator] putin faces domestic pressure. with a troubled economy, he shores up support at home by playing great power politics with the u.n. - [schiff] sanctions i think can be very effective. the russians fear nothing more than a collapse or degradation of the russian economy leading to mass protests which could lead to putin's ouster. - he's reliant on the continued support of a number of the oligarchs. a number of the multi-billionaires. - [polyakova] russia is not a democracy with any meaning of that word today. but they still have elections and putin still cares about having a good show at the elections. - what he has to be worried about is his cronies. and what he has to worry about in particular is the price of oil. if the price is low, the masses lives will become so miserable that the prospect of uprising is greater. - [narrator] some argue that preventing more countries from joining nato would contain russia without antagonizing the country. - the move of nato into central and eastern europe, right up to the border

- [narrator] for decades, the u.s. has been a leader in promoting global health. it does so through foreign aid designed to improve the welfare of others, as well as through emergency assistance to fight epidemics like zika and ebola. but foreign assistance has fallen out of favor with some in washington, who argue the u.s. should help itself before helping others. that puts them in confrontation with policy makers who say aid is a good strategy, keeping americans safe from epidemics at home and improving the health, economies, and security of neighbors abroad. does investing in global health improve america's security and other national interests? global health: preventing pandemic, next on great decisions. - [voiceover] great decisions is produced by the foreign policy association, in association with thomson reuters. funding for great decisions is provided by pricewaterhousecoopers, llp. - [narrator] promoting global health has long been a shared goal of the international community. - when the plague hit europe in the 14th century, about a third of europe peris

narrator: and now ravens are attacking adult tortoises. esque: a few ravens have learned to kill adult tortoises. and so that's just a few individuals right now that are a problem, but each new brood that they are able to produce learns a little bit more from them. and then that's how we get populations that change their behavior. mullen: so you get an adult tortoise that's finally at breeding age, that's a really valuable commodity: a breeding adult. and every one of those is precious to us now. so it's a different situation than it used to be. narrator: today numerous agencncies are coorordinating research into tortoise behavior and the relationship between the tortoise and its environment. lovich: this is a male, so it wouldn't surprise me that he made a spectacular movement. narrator: this study is being conducted on a wind farm just outside of palm springs, california. tortoises spend much of their time in burrows and may use more than one burrow. woman: t the head of the tortoi. do you see the head? narrator: radio transmitters, harm

- [narrator] now social media is proving to be a double-edged sword. important means of free expression around the world, but it also allows for the proliferation of misinformation. undermining the integrity of the free press. the media and foreign policy. next on great decisions. (dramatic music) - [announcer] great decisions is produced by the foreign policy association, in association with thomson reuters. funding for great decisions is provided by price waterhouse coopers, llp. (regal music) - [narrator] when america's founding fathers wrote the bill of rights, they enshrined freedom of the press in the very first amendment. - freedom of the press was one of the foundational elements of democracy and one of the most important elements. but the press was very different in those days, and maybe that's a good reminder when we look at our partisan bickering and polarization today. the press was very partisan. - the idea was partly an extension of political competition and partly, it believed that robust debate and argument would over time create a heal

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narrator: today on "earth focus," coral reefs are home to 1/4 of all fish and marine life. but now, due to rising ocean temperatures, coral reefs are in great peril. around the world, dedicated people are working together to save the coralals, coming up on "earth focus." coral reefs are the most diverse ecosystems on the planet. while they cover less than 2% of the ocean floor, reefs provide livelihoods, food, and shoreline protection, as well as being home to millions of aquatic species. but coral reefs everywhere are being destroyed by warming seas, chemical runoff, plastic waste, and destructive fishing practices. man: coral reefs are very important for fish populations and diversity. narrator: mark van thillo is the captain of the mir, a 100-foot sailing vessel built in 1910 and world headquarters of the biosphere foundation, which he created w with gaie alling, an ocean scscientist and his paparr of 30 years. together, they have been on the leading edge of documenting the dramatic changes in the planet's coral reefs. alling: we started an 18-year expedition around the

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narrator: mark van thillo is the captain of the mir, a 100-foot sailing vessel built in 1910 and world headquarters of the biosphere foundation, which he created w with gaie alling, an ocean scscientist and his paparr of 30 years. together, they have been on the leading edge of documenting the dramatic changes in the planet's coral reefs. alling: we started an 18-year expedition around the world, and it was to look at coral reefs. we looked att 49 sites arround e world, and we found that 2/3 of the coral reefs in earth were at risk and suffering, in decline. van thillo: we were in the south pacific. we were sailing past the phoenix islands, and we had just heard that "national geographic" had been there a year earlier, and they hailed it as being the most beautiful reef and most amazing place to go. so our crew said, "let's go there, check it out, and we'll take a break and we'll go diving on fantastic reefs." and as they arrived there, they found that almost the entire reef was dead. man: 2004, 2005, the middle of the ocean, the phoenix islands in the middle of the ocean, the nation o

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>> narrator: tonight on "frontline". >> this is a crime that hides in plain ght. >> it's probably one of these things that you just don't want to know. >> narrator: immigrant teenagers forced t work. >> they were kids like me, 14 and a half, 15. >> narrator: at farms that feed our families >> they're vulnerable and easy to victimize. and they're alone. >> narrator: "frontline" takes you on a journey fm central america to the american heartland. >> we've got these kids. for us to just throw them to the wolves, it's wrong. >> narrator: reporter ffodil altan, from the uc berkeley imstigative reporting program, goes inside a cral conspiracy. >> altan: is pablo someone you would ever conder dangerous? >> i think he's like a rat in a corner if you trapped in it. >> narrator: "trafficked in america" >> "frontline" is made possible by contributions to your pbs station from viewers like you. thank you. and by the corporation for public broadcasting. additional support is provided by the abrams foundati committed to excellence in journalism. the parkoundation, dedicated to heightening public aw

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well, it's been told. ♪ ( traffic sounds ) narrator: our story happens here too...harder to find. you see, it's down here on street level. reie pettus: when warfirst std down here, redevelopment had come through,