Your Tuesday Briefing: Brussels, Cuba, iPhone
• Brussels is under lockdown.
Explosions this morning at the city’s main airport and a subway station killed at least 28 people, causing the authorities to shut down all public transportation in Belgium’s capital.
Follow our live blog for updates.
Salah Abdeslam, the prime surviving suspect in the Paris attacks in November, was arrested in the city on Friday.
• Baseball diplomacy.
President Obama will give a televised address to Cubans today offering a vision for better relations, meet with activists and end his trip by watching Cuba’s national team play the Tampa Bay Rays in an exhibition game.
At a meeting on Monday, Mr. Obama criticized Cuba over its human-rights record, while President Raúl Castro said the U.S. economic embargo and the American base at Guantánamo Bay were obstacles to fully normalized ties. We have a video of their discussion.
Here’s our full coverage of the visit.
• Red-faced Republicans.
Primary voters are embarrassed by their party but seem to be coming together around Donald J. Trump, despite party leaders trying to derail him, according to our new poll, conducted with CBS News.
The poll also shows that growing numbers of Democratic primary voters are more excited about Bernie Sanders as their possible nominee than they are about Hillary Clinton.
Arizona and Utah hold presidential primaries and caucuses for both major parties today; Idaho Democrats also vote in a caucus.
• The F.B.I. may not need Apple’s help.
The Justice Department says in a court filing that a third party has shared a way for the F.B.I. to possibly unlock the smartphone used by a gunman in the San Bernardino, Calif., attack.
A court hearing set for today on the government’s bid to gain access to the phone’s data has been canceled as a result. The government must still test the method.
• Looming climate shifts.
Leading climate scientists warned today that a global-warming limit agreed to by nations years ago would actually be highly dangerous.
The forecast before the end of this century includes: killer storms stronger than any in modern times, the disintegration of large parts of the polar ice sheets, and a sea rise that will begin drowning coastal cities.
• Puerto Rico versus investors.
The debt-laden U.S. territory will be up against financiers at the Supreme Court today. The island says it urgently needs to restructure its $72 billion in debt but cannot because Chapter 9 of the bankruptcy code — the chapter for insolvent local governments — specifically bans Puerto Rico from doing so.
Only Congress can enact bankruptcy laws. Puerto Rican officials argue that Congress couldn’t intend to ban it from bankruptcy court; investment firms say that’s what the code does.
Separately, the Court agreed to hear an appeal from Samsung on what it must pay Apple for infringing on part of the design of the iPhone.
• Apple has unveiled smaller versions of its iPhone and iPad Pro.
• Many older workers are encountering harsh treatment in the workplace, but age discrimination is difficult to prove.
• As tax time nears for Americans, we’ve got some money-saving tips.
• U.S. stocks had modest gains on Monday. Here’s a snapshot ofglobal markets.
• Sports roundup.
Raymond Moore, who said that women’s tennis players owed a great debt to men, resigned as director of the BNP Paribas Open in Indian Wells, Calif.
The top seeds Connecticut and Notre Dame advanced to the round of 16 in the N.C.A.A. Division I women’s basketball tournament.
• One way salaries drop.
When large numbers of women enter a field, the pay goes down, a study found. But pay goes up in fields where men began to outnumber women.
• Top of the charts.
Rihanna is back in the No. 1 spot on Billboard’s album chart — this week’s numbers especially show the differences between the list’s formula developed in 2014 and the one before it.
• In memoriam.
Andrew Grove, 79, helped lead the semiconductor revolution as the longtime chief executive of Intel.
Bob Ebeling, 89, a booster-rocket engineer tried to stop the Challenger launch in 1986, warning of catastrophe because of the cold temperatures the night before the launch. He spent the rest of his lifefeeling guilty.
• What is Boaty McBoatface?
That could be the name of a nearly $300 million British research vessel built to explore the coldest regions on Earth. It’s leading in an online poll.
• Welcome, spring.
We’ve got checklists and tips to help streamline the annual cleaning ritual.
• Degree of difficulty: easy.
There are many recipes for Taiwanese three-cup chicken, but this one is tested and Times approved.
Say you swam the full length of the Amazon, Yangtze, Mississippi, Danube and Paraná rivers and you’re wondering: How do I top that?
For Martin Strel, the answer is obvious. Starting today, World Water Day, he’ll try to swim the entire circumference of Earth.
Mr. Strel, a 61-year-old Slovene, plans to swim about 25,000 miles, passing through 107 countries, in about 450 days. That means he would finish around July 2017.
That’s a great deal farther than his 3,278-mile Amazon swim, which was chronicled in the 2009 documentary “Big River Man.” Boats escorting him down the river poured blood over the side to distract piranhas. (He still got bit.)
Mr. Strel appears to be different from other people. His team says that his body cannot develop lactic acid, which is produced during exercise and causes muscle fatigue.
His past swims have promoted environmental awareness, and this time will be no different.
Over the next 15 months, Mr. Strel hopes to draw attention to water pollution. It’s an issue he’ll literally jump into when he swims in waters like the Nile, the Yangtze and the Ganges.
Good luck, Martin.