270 people were killed when a dam owned by the mining giant Vale collapsed. After a year-long investigation, WSJ's Samantha Pearson and Luciana Magalhaes explain the negligence and coverup inside one of Brazil's biggest companies.

Tesla's stock has been on a tear since late last year, and this week the company's valuation reached $100 billion. Investors who believe in the stock couldn't be happier. But others think the company is overvalued. WSJ's Gunjan Banerji explains the divide.

BlackRock, the biggest money manager in the world, announced that it plans to make sustainability a focus of its investment strategy. WSJ's Geoffrey Rogow explains what the change means.

Opening arguments kick off this week in the Senate's impeachment trial. President Trump has assembled a legal team with a lot of star power to defend him. WSJ's Michael Bender introduces us to the team and explains their case.

The Boeing 737 MAX has been grounded for nearly a year after two deadly crashes. WSJ's Alison Sider explains how the plane's grounding has upended carriers like American Airlines and rippled through the aviation industry.

Attorney General William Barr criticized Apple on Monday for not helping the Department of Justice get into the iPhones of the Florida naval base shooter. WSJ's Robert McMillan explains Apple's philosophy on letting the government in.

After a deadly mass shooting, Airbnb faced questions about how much responsibility it has for safety at the properties listed on its site. WSJ's Kirsten Grind investigates Airbnb's efforts to fight crime on its platform.

The Democrats running for president this year have employed three different fundraising strategies to fuel their campaigns. WSJ's Julie Bykowicz breaks down the different tactics and explains how those strategies could shape the race.

The world desperately needs new antibiotics to tackle the rising threat of drug-resistant superbugs, but there is little reward for doing so. WSJ's Denise Roland explains problems facing antibiotics companies.

Google has struck deals with health providers that give the company access to millions of personal medical records without notifying patients. WSJ's Rob Copeland explains Google's plans for the data.

Facing questions about his escape from Japan, former auto executive Carlos Ghosn defended himself against charges of financial crimes in a blistering and emotional press conference. WSJ's Nick Kostov explains Ghosn's defense.

Iranian missiles struck two Iraqi bases housing U.S. troops last night, a response to the United States' killing of an Iranian general. WSJ's Sune Engel Rasmussen explains what went into Iran's decision.

Carlos Ghosn went from a globe-trotting top executive to international fugitive in a year. WSJ's Nick Kostov explains what led Ghosn to flee Japan in a box made for audio gear and how he pulled off his escape.

Goldman Sachs helped Malaysia raise over $6 billion for its economic development fund, 1MDB. Prosecutors say much of the fund's money was then stolen. WSJ's Liz Hoffman explains the scandal and why the bank may soon face punishment for its alleged role.

A U.S. strike in Baghdad killed Iranian Major General Qassem Soleimani yesterday. WSJ's Michael Gordon explains Soleimani's significance, what's known about the killing and what it means for the region and the U.S.

Google has long held up its search results as objective and essentially autonomous, the product of computer algorithms. But WSJ's Kirsten Grind explains how Google has interfered with search more than the company has acknowledged.

Adam Neumann, WeWork's former CEO, has been under intense scrutiny since the company's fall from grace. But there's also another group of people behind the dramatic unraveling: WeWork's investors. WSJ's Maureen Farrell and Eliot Brown take us into the thinking of WeWork's biggest backers.

The U.S. announced a "phase one" trade deal with China last week, halting the trade war between the countries. WSJ's Jacob Schlesinger looks back on a year of escalating tariffs and explains what it was like for businesses caught in the middle.

A new California law requires businesses to reclassify many workers as employees rather than independent contractors. As the deadline to implement the law nears, some companies are confused about whether they're included. Others are opting out. WSJ's Christine Mai-Duc explains.

The House is set to impeach President Trump. From there, the case would move to the Senate for a trial. WSJ's Lindsay Wise explains what that process looks like and the political maneuvering around it.

When Disney releases "The Rise of Skywalker" this week, the company will try to walk a fine line: Keep Star Wars superfans happy and attract new audiences to the franchise. WSJ's Erich Schwartzel explains Disney's balancing act.

The Federal Trade Commission is considering a move that could stop Facebook from further integrating with WhatsApp and Instagram. WSJ's Deepa Seetharaman explains what the decision would mean for Facebook as it faces antitrust investigations.

Former Federal Reserve Chairman Paul Volcker died this week at 92. Volcker steered the American economy through runaway inflation in the 1980s. WSJ's Greg Ip knew Volcker and shares the stories that shaped the man's life.

President Trump campaigned on scrapping Nafta. But getting that done wasn't so easy. Now, Congress is close to making a deal. WSJ's Josh Zumbrun explains the new trade agreement, USMCA.

It's the biggest IPO in history. Saudi Arabia's state-backed oil company, Aramco, started trading today. WSJ's Summer Said explains why the record-setting valuation was still a letdown for Crown Prince Mohammed bin Salman and what it means for his leadership.

Global tech companies have been eager to access India and its hundreds of millions of internet users. WSJ's Newley Purnell explains why the country is putting up roadblocks.

Just 10 days after he became the CEO of Bayer, Werner Baumann made the move to buy Monsanto. He was betting that the acquisition would make the company into an agricultural powerhouse. Instead, it opened Bayer up to tens of thousands of lawsuits and became one of the worst corporate deals in recent memory. WSJ's Ruth Bender explains.

Political advertising is flourishing online, but federal guidelines regulating those ads are virtually absent. WSJ's Emily Glazer explains why Facebook, Twitter and Google are making their own rules.

Constitutional experts testified this week on what makes for an impeachable offense, and Democrats and Republicans argued their sides of the case in dueling reports. WSJ's Siobhan Hughes explains.

The world's largest hedge fund, Bridgewater, has placed a massive bet that stock markets will fall by late March 2020. WSJ's Juliet Chung explains its possible motivations.

Pet-supply stores had long withstood the threat posed by online shopping. That was until Chewy came along. WSJ's Miriam Gottfried tells the story of how PetSmart responded to the new competition.

TikTok is the first Chinese-owned social media app to take off in the U.S. But TikTok's growth has led to scrutiny from the U.S. government. WSJ's Patrick Barta explains.

The Justice Department is moving to terminate rules that have governed the film industry since the 1940s. WSJ's Erich Schwartzel explains why the rules were established in the first place, and a theater owner talks about what the end of the rules means for him.

As Renaissance Technologies grew into the world's most successful hedge fund, co-CEO Robert Mercer made a fortune. Then, he started spending it. In his new book, "The Man Who Solved the Market," WSJ's Greg Zuckerman followed Mercer's foray into political spending, and the consequences for the firm that Mercer helped build. Part two of a two-part series.

In the 1970s, Jim Simons left academia to pursue a wild idea: That he could beat the market using math. It would lead him to build the most successful hedge fund of all time. WSJ's Greg Zuckerman charted the rise of Simons's firm and the turmoil that roiled it in his new book, "The Man Who Solved the Market." Part one of a two-part series.

It started with a phone call. In a week, a scammer would take Nina Belis's life savings. WSJ's Sarah Krouse explains why robocalls persist: Because sometimes they work.

Protests in Hong Kong have spiraled into increasingly violent clashes with police. WSJ's John Lyons explains what's changed on the ground.

Fracking made the U.S. the top oil producer in the world. WSJ's Christopher Matthews explains what drove the fracking boom and what may cause its undoing.

Taylor Swift and her former record label, Big Machine, are in a dispute over Swift's rights to perform her old music. WSJ's Anne Steele on the implications of the fight.

A 2019 Super Bowl ad kicked off a showdown between the maker of Bud Light and the maker of Coors Light. WSJ's Jennifer Maloney explains how that standoff has led to accusations of corporate espionage, two lawsuits and questions about the future of the beer industry.

Nike said it would no longer sell its products on Amazon after two years on the platform. WSJ's Khadeeja Safdar explains why the two companies split.

An obscure think tank in Boston is getting drug companies to lower their prices - using something called a QALY. WSJ's Denise Roland explains what a QALY is, and why it's controversial.

Google is amassing detailed health information on millions of people without their knowledge. WSJ's Rob Copeland explains 'Project Nightingale' and why it sparked a federal inquiry.

House Democrats this week hold the first in a series of open impeachment hearings. WSJ's Siobhan Hughes explains who will testify and what to expect in the questioning.

WhatsApp announced in May that there had been a flaw in its app that allowed hackers in. Then, it did something pretty unusual. WSJ's Bob McMillan explains WhatsApp's new strategy to stop hacking.

The College Board, the nonprofit behind the SAT, sells students' information to colleges. WSJ's Doug Belkin explains how that data feeds the college application frenzy.

For years, Under Armour was one of the fastest growing apparel companies. But now, growth has sputtered and the company is under federal investigation. WSJ's Khadeeja Safdar explains.

Part of what sent Bitcoin climbing to nearly $20,000 two years ago was market manipulation by a single entity, a new study concludes. WSJ's Paul Vigna explains.

Cracks are showing at the most influential investment fund in the world. WSJ's Liz Hoffman explains the workings and strife inside SoftBank's Vision Fund.

In the Mexican city of Culiacán, a drug cartel battled with soldiers...and won. WSJ's David Luhnow on what the fight says about the power of cartels in Mexico.

The White House and California have been at odds over vehicle emissions standards. WSJ's Tim Puko explains the tug of war that's dividing auto makers.

In response to a recent uptick in gun violence, Tacoma, Wash., has proposed a tax on gun sales. WSJ's Zusha Elinson looks at the possible effects of the measure.

To prevent wildfires, California's largest utility company, PG&E, is shutting off power to millions. WSJ's Ian Lovett and grocery store manager Melanie Bettenhausen share what life is like in California's blackouts.

A WSJ investigation shows that Amazon offers clothing from factories that most leading apparel companies have said are too dangerous to work with. Justin Scheck explains.

A few weeks ago, WeWork was at a low point. It had slashed its valuation, canceled its IPO and was a few weeks away from running out of money. Now, its co-founder Adam Neumann is walking away with a fortune. WSJ's Maureen Farrell talks about WeWork's rapid fall and what comes next.

States and municipalities around the country have been seeking compensation from companies for the opioid crisis. WSJ's Sara Randazzo and Gordon Fairclough talk about how the lessons learned from tobacco settlements 20 years ago are complicating the process.

Diplomat Bill Taylor said Tuesday that President Trump made nearly $400 million in aid contingent on Ukraine investigating the president's political rivals. WSJ's Rebecca Ballhaus explains the significance of Taylor's impeachment testimony, and Siobhan Hughes talks about the reaction on Capitol Hill.

Years before two 737 MAX planes crashed killing 346 people, employees inside Boeing expressed concerns over the automated system that regulators say is to blame. WSJ's Joanna Chung talks about new information in the probe of the 737 MAX.

After two years of apologizing to critics, Mark Zuckerberg and Facebook are changing their playbook. WSJ's Jeff Horwitz explains why Facebook is tying its identity to free speech.

Energy Secretary Rick Perry gave an exclusive interview to WSJ's Tim Puko about his interest in Ukraine and how it led to a call with President Trump's personal lawyer, Rudy Giuliani.

President Trump's decision to withdraw about 50 troops from northeastern Syria set off a chain of events that has reshuffled power in the region. WSJ's Dion Nissenbaum explains.

Political campaigns have long collected personal information to try to reach voters. But increasingly they're looking at a new data point: your phone's location. WSJ's Emily Glazer explains how this could affect 2020 races. For a guide on how to limit location tracking, visit on.wsj.com/geo

Amtrak has lost money for decades. Its CEO - a man who formerly ran Delta Airlines - thinks he can change that. WSJ's Ted Mann explains the changes Richard Anderson wants to make to America's passenger rail company.

FBI agents came to the Reilly family's door twice. The first time, they enlisted Billy Reilly in helping the agency. The second time, he'd just gone missing. WSJ's Brett Forrest spent years looking for Billy.

Rebecca Davis O'Brien reports on a federal investigation into allegations of sex abuse and fraud at USA Swimming. She also explains a second, broader investigation into U.S. Olympic organizations.

The White House blocked a witness from testifying in the impeachment inquiry on Tuesday and released a letter criticizing the process. WSJ's Rebecca Ballhaus explains the latest in the investigation.

The general manager of the Houston Rockets sent a tweet that has thrown the NBA into a crisis. WSJ's Ben Cohen explains the tweet, the backlash and the challenges western companies face doing business in China.

The Supreme Court will take up the question Tuesday of whether employees can be fired because of their sexual orientation or gender identity. WSJ's Jess Bravin explains the arguments.

PayPal said Friday it was pulling out of Facebook's new cryptocurrency project called libra. Paul Vigna explains why Facebook started the project and what has regulators concerned.

Jeff Luhnow of the Astros and Daryl Morey of the Rockets are two Houston-based general managers that have upended the sports world with their commitment to data. They had lunch. We recorded it.

The same major investor is behind both Uber and WeWork: SoftBank's Vision Fund. Phred Dvorak talks about the rise of SoftBank's unorthodox founder, Masayoshi Son, and how his aggressive investment strategy is being put to the test.

This summer, a cluster of sick teenagers with pneumonia-like symptoms sparked a Wisconsin hospital to solve a medical mystery. Brianna Abbott explains how the doctors sounded the alarm on a public health crisis that has been linked to more than 10 deaths and 800 illnesses.

For years, Snap Inc. has been documenting all the ways it believes Facebook has tried to kill it, in a secret dossier called Project Voldemort. Deepa Seetharaman explains what's in Project Voldemort, and how it might factor into U.S. antitrust investigations of Facebook.

In the whistleblower complaint alleging abuse of power by Donald Trump, one man is mentioned more than 30 times: Rudy Giuliani, the president's personal lawyer. WSJ's Rebecca Ballhaus explains how Giuliani's consulting work connects to this week's impeachment inquiry.

A newly released whistleblower complaint sits at the center of Democrats' impeachment inquiry into President Trump. WSJ's Jerry Seib goes through the complaint's timeline.

After a nearly yearlong debate among Democrats, House Speaker Nancy Pelosi announced an impeachment inquiry into President Trump. WSJ's Siobhan Hughes explains what led the speaker to change her mind.

AT&T grew into a conglomerate by buying media companies like DirecTV and Time Warner. Now, activist investor Elliott Management is challenging that bigger-is-better strategy. WSJ's Marcelo Prince explains what Elliott wants, and what it means for AT&T and other big companies like it.

Banks are looking for ways to lend to riskier borrowers again. WSJ's AnnaMaria Andriotis explains how magazine subscriptions, utility bills and where you shop are part of the new approach to lending.

WeWork recently delayed its IPO after investors raised concerns. WSJ's Eliot Brown explains why much of the skepticism centers on the bizarre leadership of CEO Adam Neumann.

The United Auto Works walked off the job and started striking this week. It's the first UAW strike against General Motors in over a decade. WSJ's Christina Rogers explains how both sides reached this deadlock.

California just passed a bill to allow college athletes to earn endorsement money, which the NCAA prohibits. WSJ's Rachel Bachman explains what the change could mean for college sports.

Major oil facilities in Saudi Arabia were bombed over the weekend. WSJ's Rory Jones saw the aftermath of the attacks, and he explains what it means for the world's oil supply and tensions in the Middle East.

PG&E, California's biggest utility, has a long record of run-ins with regulators. WSJ's Rebecca Smith reports on over two decades of misconduct at the company.

Democrats have a new idea for how to tax the richest Americans: taxing wealth, not just income. Rich Rubin breaks down three plans, from Joe Biden, Julian Castro and Elizabeth Warren.

Attorneys general from 48 states, D.C. and Puerto Rico announced an antitrust investigation into Google's advertising business this week. Rob Copeland explains how Google's ad business works, how it grew so large and what has investigators concerned.

John Bolton, President Trump's national security adviser, left the White House on Tuesday. WSJ's Michael Bender explains why Bolton and the president parted ways.

Netflix changed entertainment with binge watching and streaming. Now, competitors like Disney are trying to use Netflix's playbook against it.

Voters are heading to the polls in North Carolina on Tuesday for a closely watched special election. How certain people vote may offer clues for how next year's presidential election could go.

Emails disclosed this week at the University of Southern California show how the school weighed donations in considering whether to admit students. Plus, the story of the SAT's "adversity score."

The inside story of how the founder of one of the first DNA-test companies, FamilyTreeDNA, wrestled with the choice to let the FBI use his company's database.

Office-space startup WeWork was last valued at $47 billion. WSJ's Eliot Brown looks at the questions around WeWork's business model and CEO as it prepares to go public.

In an interview with WSJ's Gerald Seib, former Defense Secretary Jim Mattis talks about his time working for President Trump, the threats facing the U.S. around the world, and what he'd like to see more of in American politics.

Many people in the U.S. get paid every two weeks. The question is: Why? And does it need to be that way? Banking reporter Telis Demos looks at how the two-week pay cycle came to be and a new push to change it.

On Monday, a judge ordered Johnson and Johnson to pay Oklahoma $572 million for its role in the state's opioid crisis. And Tuesday, news broke that Purdue Pharma, the manufacturer of OxyContin, is in talks to resolve more than 2,000 opioid cases in a deal worth as much as $12 billion. WSJ's Sara Randazzo explains what the past two days mean for the fight to hold drugmakers legally accountable.

This summer, more worrying signs about the health of the American economy have emerged. WSJ's Jon Hilsenrath explains the tricky position the U.S. finds itself in if a slowdown arrives.

A WSJ investigation has found that thousands of items offered by third-party sellers on Amazon have been declared unsafe, are deceptively labeled, or have been banned by federal regulators. Alexandra Berzon and Justin Scheck share the findings of their reporting.

Broadband providers have marketed faster internet speeds for years, selling consumers on the promise that faster is better. The Wall Street Journal's Shalini Ramachandran and Thomas Gryta looked into whether that's actually the case.

What happened to the city that raised its minimum wage to the highest in the nation? Jim Carlton and Eric Morath look at Emeryville, California's big experiment, and what happens when the minimum wage goes north of $15.

For ten weeks, protestors have taken to the streets of Hong Kong. Natasha Khan explains how Hong Kong's recent history plays into the tensions and what the protests mean for the future of the city.

A Wall Street Journal investigation shows that employees of Huawei, the Chinese telecom company, helped the governments of African nations intercept the communications of political opponents. Josh Chin tells the story of how Huawei technicians helped governments crack down.

FedEx last week said it would stop shipping packages for Amazon. Paul Ziobro and Dana Mattioli talk about why FedEx essentially cut ties with a company that would seem to be its perfect customer.

As the trade war escalated into an emerging currency fight this week, the U.S. labeled China a currency manipulator. A similar historical rivalry - between the U.S. and Japan in the 1980s - shows how these types of battles can play out. Mike Bird explains.

What's better: promoting e-cigarettes to help smokers quit, or restricting vaping so teens don't pick up a new nicotine addiction? Jennifer Maloney explains the challenges vaping company Juul poses to public health officials. Plus, Tripp Mickle on a mystery in the Apple App Store.

This weekend, two mass shootings claimed at least 31 lives. One of those shootings took place at the nation's largest private employer: Walmart. Reporters Valerie Bauerlein and Sarah Nassauer discuss the shooter's intentions and the implications for large retailers.

Capital One has prided itself on being a tech-forward bank. But earlier this year, the bank got hacked, and 106 million people had their information stolen. AnnaMaria Andriotis and Liz Hoffman talk about what happened and what it means for financial institutions.

The Federal Reserve cut rates today for the first time since 2008. The cut comes after a year of pressure from President Trump. Nick Timiraos looks at what factored into the central bank's decision. Plus, a word on your wallet.

Jeffrey Epstein, the financier recently indicted on sex trafficking charges, built a fortune of more than half a billion dollars. Ken Brown explains how Epstein amassed his wealth, and Jenny Strasburg looks at Deutsche Bank's role in Epstein's recent financial dealings.

Boris Johnson is now Prime Minister of the U.K. This raises the likelihood that the country could leave the European Union without a plan in place. Jason Douglas explains the economic impacts. Plus, what the company that made whistles for the Titanic has to do with it.

With all of the new technology that employees use at the office, companies have a lot more data on what their workers are doing. It is now cheaper and easier than ever for employers to spy on them. Sarah Krouse explains what's happening, and why there's little you can do about it.Plus, how a film critic finagled a trip to the moon launch.

Some investors say that for Uber to truly succeed, it needs to eliminate its competition. After two disappointing listings, can Uber and Lyft co-exist? Maureen Farrell has been covering Uber and Lyft's IPOs. Plus, a boss gets a major shock when he tries to help a sick employee.Update: Lyft raised more than $2 billion in its IPO. An earlier version of this episode incorrectly stated that Lyft raised a little over $1 billion.

One company set out to make a new shoe entirely in the United States and learned it is much more complex than making a grilled cheese sandwich. Ruth Simon talks about her recent trip to a boot manufacturer in Red Wing, Minnesota.

The exurbs, the regions far beyond a city center, are back. Home building and sales are rising. But the housing rebound in these areas comes as the rest of the housing market has slowed. WSJ's Laura Kusisto explains what it could mean.

One company was responsible for some of the biggest wildfires that have swept through California in the past few years, killing more than 100 people. That company? PG&E Corp., California's largest electric utility. As the state enters wildfire season, WSJ U.S. Energy Editor Miguel Bustillo talks about the company and what's in store.

Got a burst pipe or a broken down car? That plumber or mechanic you found on Google Maps might not be where they say they are. Or they might not be anywhere at all. Reporters Rob Copeland and Katie Bindley have found that hundreds of thousands of the listings on Google Maps aren't what they claim to be.

Some Democratic politicians are talking about a future where college is free. For one city, that's already the case. Education reporter Josh Mitchell went there, and on this episode he shares what he learned.

The U.S. just hit the 10-year mark of nonstop economic growth. In July, the economy will have grown for longer than any stretch in its history. But who or what might kill this expansion? Reporter Jon Hilsenrath explains.

Welcome to The Journal. A show about money, business and power. Coming June 26.