Our correspondent walked the length of Hadrian’s Wall, in northern England, finding shifting party alliances and surprising views on Brexit. We take a look at the phenomenon of Japan’s hikikomori, who shut themselves in for years on end. And why a plague of rats in California is likely to get even worse. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer

A massive, rolling, national strike begins today, in protest against proposed reforms of the sprawling pension system. But details of the changes haven’t even been published yet. Our correspondent visits the conflict-ravaged Darfur region, and sees a historic opportunity for peace. And a look at how best to let entrepreneurial immigrants get back in business. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer

The House Judiciary Committee will now take up the inquiry into President Donald Trump. But will any of it matter to uninterested voters? The probe into the mysterious death of an investigative journalist is now haunting Malta’s halls of power. And a look back on the life of a beloved athlete who never quite won cycling’s biggest prize. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer

It will be all smiles at the NATO summit today in London--but many of them will be forced. Behind the scenes, the alliance’s leaders are arguing about what its purpose should be. We also look at the disputed data behind the idea that inequality has been rising inexorably in recent years. And how a novel way to reduce cow and sheep burps could help in the fight against climate change. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer

The Islamic militant who killed two people in London last week was supposedly being monitored by the authorities. That revelation has prompted a fierce debate about what went wrong. We take a look at the state of the global AIDS epidemic. And as their country goes to wrack and ruin, Venezuelans have been turning to video games, but not for the reasons you might think. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer

Andrés Manuel López Obrador, Mexico’s president, is wildly popular, in part because of his determination to wipe out corruption. But is his crusade against graft everything it’s cracked up to be? We also look at the debate around randomised control trials, a popular but controversial tool in economics. In Congo, caterpillars are considered a delicacy. We explain why they deserve to be the next superfood. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer

Donald Trump used to lionise generals, but this week he had a falling out with the top brass. Are the armed forces becoming as politicised as America’s other institutions? We also take a look at the emergence of a new narco-state in West Africa, Guinea-Bissau. And Silicon Valley has been trying to shed a reputation for sexism, but many of its products remain ill-suited to women. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer

The UN has just released its annual report on how well the fight to slow climate change is going. It finds that efforts to reduce greenhouse-gas emissions are going from bad to worse. We also look at a surprising new lease on life for China’s regional dialects. And while people debate about the merits of Uber, one thing is clear -- it drives people to drink -- or so new research suggests. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer

Michael Bloomberg, the billionaire former mayor of New York, has announced he is running for president. But he is late to join the race and not very popular with Democratic primary voters. We also look at TikTok, a wildly successful video-sharing app, that some see as a threat to security in the Western world. And much of Switzerland is up in arms--about the reliability of the country’s coffee supply. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer

After almost six months of protests and street battles, Hong Kongers have had a chance to vote in local elections. They sent a clear message of support to those agitating for greater democracy. We look at how the impeachment hearings in Washington are undermining the fight against corruption in Eastern Europe. And deep below Jerusalem, a high-tech cemetery is under construction. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer