Top News

• North Korea Threatens Again

Kim Jong-un, after careful consideration, responded to Donald Trump’s UN speech by threatening to detonate a hydrogen bomb. There have been no above-ground nuclear detonations in the world since 1980. Such an exercise would be the ultimate proof of North Korea’s ability to deliver a nuclear payload via long-range missiles, a question which, for now at least, remains in some doubt. Kim also responded to Trump’s personal insults with some choice words of his own, continuing a richly entertaining game of nuclear-tipped “Yo’ Mama” jokes that the rest of the world somehow forgot to laugh at.  Time

• Facebook Election Ads 

Facebook said it would turn over to special counsel Robert Mueller the details of 3,000 ads connected to last year’s elections that it thinks were paid for by Russian agents. Elliot Schrage, Facebook's vice president of policy and communications, said it wouldn’t disclose details about the ads to the public, out of respect for advertisers’ privacy. It goes without saying that the $100,000 that Facebook reportedly received for the ads pales in comparison to overall spending on ads during the election. Fortune

• Who Will Keep Angela Company After Sunday?

Germany goes to the polls this weekend, with Angela Merkel as good as assured a fourth term as chancellor. After Sunday, she’ll have more leeway to seek a rapprochement with President Trump without the fear of losing votes. Tax cuts are a near-certainty, which will help the Eurozone economy offset any slowdown in the U.S., but her chief efforts in a final term will be directed at making her migrant policy work, helping the car industry through the electric transition, and—if Emmanuel Macron can persuade her—making the Eurozone proof against future crises. Fortune

• London Bans Uber

London’s transport regulator said it won’t renew Uber’s license at the end of the month, saying it wasn’t a “fit and proper” operator of a taxi service. Transport for London took issue with its sloppy background checks, the use of its Greyball software to deceive regulators, and with its selective reporting of crimes to the police. Uber, displaying its usual degree of self-awareness, responded that the move proved London “isn’t open to innovative companies.”  Fortune

Around the Water Cooler

• L’Oréal in Play After Bettencourt’s Death

Lilian Bettencourt, who inherited control of cosmetics group L’Oreal and whose family foundation still controls one-third of its shares, died aged 94. Looking beyond the personal issues, her death will invite speculation over the future of the French company: Nestlé holds a 23% stake and has the rights of first refusal on the foundation’s shares if they are offered. According to Reuters, it can’t raise its stake in the company for six months. Fortune

• HPE Plans 5,000 Job Cuts

Hewlett Packard Enterprise is planning to cut over 5,000 jobs, or some 10% of its staff, Bloomberg reported. It would be part of Meg Whitman’s drive to cut “layers” in the group as it seeks $1.5 billion in annual cost cuts. Fortune

• Mercedes to Build EVs in Alabama

Mercedes-Benz said it will invest $1 billion in its plant in Tuscaloosa, Alabama, to make electric vehicles, creating some 600 jobs in the process. The company is playing catch-up with Tesla and will only start production of its new EQ series in two years’ time in Germany. Mercedes aims to offer an electric or hybrid version of all of its models by 2022. FT, metered access

• Consolidation Coming Down the Track

Consolidation among the world’s train makers is taking a new twist. Siemens is reportedly close to choosing between Bombardier and Alstom as its preferred partner for its business, which makes Germany’s ICE expresses. A Franco-German tie-up would leave little room for competition among European rail operators, but none of the three is big enough on its own to compete in global markets with China’s CRRC. A spin-off would be another step in the gradual dismantling of Siemens’ long-cherished conglomerate model. Reuters

Summaries by Geoffrey Smith; geoffrey.smith@fortune.com

@geoffreytsmith