In May, the Chief Justice of India unwittingly gave a name to a generational protest. He called unemployed young people “cockroaches” and the mass youth movement that had begun in the wake of the sudden cancellation of a national exam took on the title - the Cockroach Janta party. But India has not been the only country that has seen Gen Z - people aged between 14 and 29 - engaging in mass protests this year. It has been happening all over the place, from Serbia to Kenya. Different grievances, different circumstances, but the same generation. So what are the youth revolting about, and are they winning?

Evidence suggests that millions around the world are ditching the most popular dating apps to pursue alternative options. Users complain that swiping is not leading to dates or meaningful relationships, just admin and fatigue. In our conversations, organisers of in-person dating events share their experiences. Amber tells us. “You could like someone’s photo, you could like speaking to them on the phone but when you meet them in person there’s something different that can’t be assessed online – that’s a big part of why people are coming back to in-person events.” We also bring together developers of specialist dating apps, including an advocate of “slow dating.”

On 11 September 2001, suicide attackers hijacked two passenger planes flying over the eastern United States and crashed them into the Twin Towers of the World Trade Center in New York, causing both buildings to collapse. The attack killed 2,753 people. As smoke billowed from the burning towers, firefighters, police officers and paramedics from across New York City raced to the scene, climbing stairwells packed with fleeing civilians in an effort to reach those trapped. When the towers fell, hundreds of first responders were still inside, and in the years since, even more have died from illnesses linked to their time working in the toxic dust of Ground Zero. Twenty-five years on, Kirsty Wark travels to New York to bring together the first responders and survivors who lived through that morning. New York Fire Department Battalion Chief Joseph Pfeifer was the first commander on the scene, and later became planning chief for the rescue and recovery effort at Ground Zero. Office worker Richard Eichen, who escaped from the 90th floor of the North Tower. Jill Pila, whose husband Jim Gartenberg worked on the 86th floor. Former NYPD officer Judy Castro, who rushed to the North Tower to help evacuate the building. St John's Hospital paramedic Jimmy Dobson, who spent the day bringing the injured to safety from the streets surrounding Ground Zero. Rear Admiral Michael Day, who coordinated the evacuation of an estimated 500,000 people off the island of Manhattan later that day. And the novelist A.M. Homes, a longtime resident of New York, who witnessed the events of the day unfold from her apartment in Lower Manhattan.

On 11 September, 2001, Paul Carris was working on the 71st floor of the North Tower of the World Trade Center. When the building was struck, he joined the evacuation and came across a colleague, Judith Toppin, who was struggling to descend the stairs. Paul stayed with her, supporting her through the long journey down as thousands fled and firefighters climbed towards the danger. They emerged only minutes before the tower collapsed. Paul believed he had saved Judith, but in the years that followed he came to understand that she had also saved him. Colm Flynn meets deacon Paul Carris to hear how the events of 9/11 transformed his life and faith. Paul recalls the extraordinary calm inside the stairwell, Judith praying Psalm 23, and the silence he later recognised as the presence of God. Twenty-five years after the attacks, he reflects on the terror of that day, and how a split-second decision to help a stranger changed his life forever.

There are over 730 sinkholes in central Turkey, and their numbers are surging, threatening farmers’ livelihoods and the country’s food supply chain. These sinkholes occur suddenly when the soil collapses, forming a gaping hole in the earth. The sinkholes are a symptom of the ongoing drought and unsustainable water extraction in Konya province, Turkey's agricultural heartland.

Myra Anubi looks at two solutions that harness the power of pictures to help disabled people. Books Beyond Words is a UK charity that publishes books with no words, just big pictures on every page. They are made for people with learning disabilities, who come together to read them in book clubs. Myra also hears about TapSOS, the only smartphone app to be approved by the UK’s emergency services, which is aimed at people who struggle to speak on the phone. We hear from one user who believes it saved his life.

Russian is the first language of millions of Ukrainians, including many of the country’s frontline troops. But it is also the language of their enemy. Its public use is increasingly restricted by law, with ever more measures to enforce communication in Ukrainian. Ukrainians are allowed to speak Russian in private conversations. But they can be fined for playing a Russian language song in the street, if the singer or composer is a Russian citizen. The state says Russian must be policed because Russia uses the language as a weapon to spread its influence. But in primarily Russian-speaking places such as Odesa, Ukraine’s third-largest city, many are unhappy about the language laws. Tim Whewell reports on the arguments dividing a city under constant Russian bombardment, as one side calls the Russian language a colonial hangover, while the other says cultural diversity is what Ukraine should be fighting for.

There is a general fear that artificial intelligence could make huge swathes of workers redundant, but are those fears unjustified? Rob Young asks what history can tell us about big technological leaps and how they changed the world of work at the time. How much of the rate of change comes down to customer preference - would you rather deal with a bot or a person?

We visit two projects exploring practical responses to homelessness and housing insecurity. Presenter Myra Anubi travels to Edinburgh to see the work of Social Bite, a charity creating small communities of prefabricated homes on unused land, offering people a stable place to live and rebuild their lives. Meanwhile, in Nantes, western France, we meet the team behind Bureaux du Cœur, which partners with businesses to open up unused office space as safe overnight accommodation for people in need.

The rescuers who dodge drones and bombs to evacuate from frontline areas in Ukraine, known as the “kill zone”. More than four years after Russia’s full-scale invasion, thousands of civilians still live dangerously close to active combat zones. Getting them to safety requires powers of persuasion, knowledge of warfare, and nerves of steel. The Global Jigsaw explores how volunteer evacuation efforts of civilians in eastern Ukraine have evolved throughout the war, and how rescuers continue to adapt to an increasingly hostile and unpredictable battlefield.

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Contributors: Vitaly Shevchenko