Vladi was just 15 years old when he joined a migrant caravan, travelling all the way from El Salvador, to Tijuana on the US-Mexico border. He arrived there last autumn with his grandmother. But by November, Vladi, was on his own. His grandmother needed to return to El Salvador, and Vladi remained at a youth shelter for other unaccompanied migrants like him. Many were hoping to seek asylum in the United States. So was Vladi. But ahead of them is the hostility of the Trump administration. The story of one family in America’s migrant crisis.

(Vladi, center, is from El Salvador. He says the gangs try to recruit you when you turn 14 or 15. He's 15. He says instead of joining a gang, he joined the migrant "caravan" headed toward the United States. Credit: Erin Siegal McIntyre/Frontline)

It’s been 40 years since the Islamic revolution in Iran. In 1979, many Iranians felt a strong sense of hope as change was sweeping through their country. Ayatollah Khomeini’s return to Iran from exile was one of the most significant moments of the revolution. Now, 40 years later, we’re hearing more of what was going on behind the scenes.

Also, we hear from two Iranians born after the revolution, who are so frustrated with conditions inside Iran, that they want to leave; we’ll look at how US sanctions on Iran are impacting American businesses; plus, the story of an Iranian-American navy veteran who grew up in revolutionary Iran; and Iranian women’s rights advocate, Masih Alinejad, explains how political hair can be in Iran.

(Revolutionary leader Ayatollah Ruhollah Khomeini leaving the Air France Boeing 747 jumbo that flew him back from exile in France to Tehran. Credit: Gabriel Duval/Getty Images)

For Dora Crespin, the United States is a lonely place. She’s happy living in El Salvador where she has her friends, familiar food, and most importantly her family. But Dora is moving to the US anyway, leaving her son behind in the hope that someday they will have a better life together.

Also, Ana Chavarin was only 13 years old when her mother made her drop out of school to work at a factory, now she’s in college, together with her son; an American priest raises funds for Cuba’s first new Catholic church in 60 years; plus, Thich Nhat Hanh, the Vietnamese monk who's credited with bringing Buddhism to the west; and with his power washer in hand, Corey Fleisher is on a mission to eliminate hate-filled graffiti.

(A couple hold hands as they ride a merry-go-round at the Theresienwiese fair ground of the Oktoberfest beer festival in Munich, Germany. Credit: Karl-Josef Hildenbrand/Getty Images)

Your social media timelines are filled with influencers; people with huge numbers of fans and followers who are sometimes paid to promote products. Influencers haven’t always been transparent about paid content but new guidelines could change that.

Also, plogging, the fitness trend that’s making streets cleaner all over the world; Durian, the fruit that’s all the rage in South-East Asia but to Westerners smells like old socks; Plus, Lucas Hixson the man who saves dogs from danger zones; and from the beaches of Southern California the story of a Senegalese Olympic hopeful and her trainer.

(Logos of the Snapchat, Facebook, Twitter, Messenger, Instagram and LinkedIn applications are displayed on the screen of an Apple iPhone. Credit: Chesnot/Getty Images)

Four hundred years ago pirates brought enslaved Africans to Virginia’s shores.

Ada Hegerberg is a professional football player from Norway. In December Hergerberg won the first Ballon d'Or for women, one of football's most prestigious awards. Hergerberg sees this moment as an opportunity to encourage young girls all over the world.

Also we’ll hear from Japanese student Kazuna Yamamoto about her petition that forced a tabloid magazine to apologize for a sexist article; In Afghanistan we visit filmmaker and activist Sahar Fetrat; we meet a ballet dancer bringing a much needed change to ballet slippers; plus we take a trip down memory lane to ‘Soul Alley’, a hangout spot for African-American GI's during the Vietnam war.

(Olympique Lyonnais' Norwegian forward Ada Hegerberg brandishes her trophy after receiving the 2018 Women's Ballon d'Or award for best player of the year. Credit: Franck Fife/Getty Images)

The next couple of years will be crucial for governments to take action on climate change. In this edition we hear why and what’s being done about it.

We meet Hilda Heine, a global leader on climate change and President of the Marshall Islands; we’ll look at how Americans recycle and find out why it’s not good enough for China; Economist Michael Greenstone explains how air pollution shaves two years off of the average life expectancy; A team of Israeli students create a new variation of falafel with spirulina, a kind of microalgae, that could be a sustainable food solution of the future; and we check out the environmentally friendly sounds of the Colombian band, Bomba Estereo.

(Photo: The leaves of a Russian River Valley pinot noir vineyard begin to turn colour near Sebastopol, California. A cool spring and mild summer have contributed to a later-than-usual harvest and a bumper crop of premium wine grapes throughout the state of California. Credit: George Rose/Getty Images)

El Salvador is one of just a handful of countries where abortion is banned in all circumstances. The ban is so comprehensive, that every miscarriage is considered suspicious and at least a dozen Salvadoran women who say they suffered a miscarriage are serving lengthy jail terms. Professor Michelle Oberman, a leading scholar on legal issues around pregnancy, tells the story of two such women who had recently been freed from prison.

Also: The story of two Somali girls in Boston who formed a friendship through writing poetry together; the tale of an unlikely bond between a guard and a prisoner at the Guantanamo Bay detention camp; We hear from a Syrian superfan of the 90s hit TV programme ‘Friends’; and Marco Werman visits a local school in Boston to hear from some very young news consumers.

(Teodora Vasquez hugs her parents shortly after being released from the women's Readaptation Centre, in Ilopango, El Salvador where she was serving a sentence since 2008. Credit: Marvin Recinos/Getty Images)

The fate of the Amazon is in jeopardy. Logging, cattle ranching, and soya bean farming are threatening its very existence. But the threat doesn’t end there; carbon dioxide coming from cities thousands of miles away is altering tropical forests and the climate on a much larger scale. In this special edition we travel to Brazil to find out why the fate Amazon is more consequential than ever and meet some of the people fighting to preserve it.

(Claudio da Silva and the Guajajara Guardians of the Forest ride up the Caru River to investigate a report of illegal cutting on Guajajara land. Credit: Sam Eaton/The World)

The US opioid epidemic is a major public health crisis that has affected many communities across the United States. We’ll hear from an expert in addiction psychiatry who thinks that doctors bear much of the blame.

Also: What do you do if opioid drugs don't stop the pain? Acupuncture may be the answer; We look at how supervised injection is already saving the lives of heroin users; the Toronto police department launched a social media campaign, reminding people that marijuana is legal in Canada and not a cause for emergency calls; the US and Mexico join forces to crack down on the illicit drug trade; and the story of Steve Hupp's transformation from bank robber to shaman.

(Boston Calling producer Daniel Ofman stands next to a bus stop advertisement of Naloxone, a nasal spray that can counteract and potentially save someone from an opioid overdose. Credit: Diego Lopez/The World)