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Hormuz Deadline, BTS Concert, and New Saturn Moons

President Donald Trump set a deadline for tonight over the Strait of Hormuz. This and more in today's digest.

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Good morning. It's Monday, March 23, and we're covering President Donald Trump's Strait of Hormuz deadline, the return of K-pop royalty, and much more. First time reading? Join over 4.7 million insatiably curious readers. Sign up here.

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 Need To Know 

 

Iran Ultimatum

President Donald Trump issued an ultimatum Saturday, threatening strikes on Iran’s power plants unless the Strait of Hormuz is fully reopened by this evening. Iranian officials said they would target critical sites in neighboring countries that host US bases in response.  

The escalation comes as the Iranian military launched a pair of ballistic missiles at a joint US-UK base in the Indian Ocean (one failed, one was intercepted). The launch was the farthest ever attempted by Iran and revealed a theoretical strike distance of nearly 2,500 miles, potentially threatening European targets

Meanwhile, new Supreme Leader Ayatollah Mojtaba Khamenei issued a second public statement via state media on the war and state of the country. Khamenei has not been publicly seen or heard since he assumed power two weeks ago. 

Separately, reports suggest US officials are considering occupying or blockading Kharg Island, which sits 15 miles off the Iranian coast and processes the bulk of its oil exports.

See satellite photos of damage across the region here.

 

Robert Mueller Dies

Former FBI Director Robert Mueller died on Friday at age 81. After leading the agency from 2001 to 2013, Mueller later became known for his role as special counsel, appointed in 2017 to investigate claims of Russian interference in the US’ 2016 presidential election.

The Mueller investigation identified contacts between the Trump campaign and Russia. By 2019, they had brought charges against six of President Donald Trump’s associates, including campaign chair Paul Manafort and Trump’s first national security adviser, Michael Flynn. However, Mueller did not find sufficient evidence that the campaign had conspired with Russia. The team did not reach a conclusion on obstruction of justice charges. (See takeaways here; see Mueller’s 448-page report here.)

Prior to the report, Mueller served as the FBI’s second-longest serving director, joining the agency days before the Sept. 11, 2001, attacks. Under his tenure, the FBI enforced the Patriot Act and documented CIA torture in Guantánamo Bay, Cuba.

 

BTS Returns

K-pop band BTS returned to the stage over the weekend for the group’s first concert in nearly three-and-a-half years. The free concert at Seoul’s Gwanghwamun Square drew tens of thousands of attendees and was livestreamed on Netflix. 

BTS (short for “Bangtan Sonyeondan,” which means “Bulletproof Boy Scouts” in Korean) debuted in 2013 and has since become South Korea’s most successful band. The group is the first since the Beatles to have three albums reach No. 1 in the US within a year (2018-19). BTS also holds the record for most music video streams on YouTube within a day (108.2 million views) for the 2021 hit "Butter." The band had been on hiatus since 2022 as its members enlisted for mandatory military service in 18- to 21-month stints. Now, they've released their fifth studio album with an 82-date world tour analysts estimate could earn at least $1.9B, approaching Taylor Swift’s record-holding $2.2B Eras Tour.

Explore the best resources on K-pop here (w/video).

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The Scientific Argument For More Salt

 

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 In The Know 

 

Sports, Entertainment, & Culture

Men's Sweet Sixteen set after first two rounds of NCAA tournament; Florida becomes first No. 1 seed eliminated, losing to No. 9 Iowa (More) | Watch thrilling end to No. 4 Nebraska's win over No. 5 Vanderbilt (More) | Women's second round concludes today; see bracket and results (More)

"Project Hail Mary" earns $80.5M at the domestic box office, $141M globally—the second-biggest debut for a non-franchise movie after "Oppenheimer" (More)

"Saturday Night Live UK" premieres with SNL veteran Tina Fey hosting the inaugural episode (More) | See previous write-up (More)

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A Fresh Start for Debt

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Science & Technology

Never-before-seen photos of astronauts Neil Armstrong and David Scott following their 1966 Gemini 8 mission revealed; capsule required an emergency splashdown after a critical in-space failure (More)

Elon Musk announces Terafab, a collaboration between his companies Tesla, SpaceX, and xAI to build a cutting-edge semiconductor manufacturing facility for AI and robotics (More

Study links same-sex courtship in male fruit flies to evolutionary changes in the expression of pheromones involved in mating (More

🤖 What we learned about the company Anthropic: The maker of the popular Claude chatbot has been in the news over disagreements with the Pentagon about how AI is used. This week's Science & Technology newsletter unpacks everything we've learned about the company—sign up here to get it in your inbox tomorrow morning!

Business & Markets

> US stock markets continued downward trajectory Friday (S&P 500 -1.5%, Dow -1.0%, Nasdaq -2.0%) amid fallout from the war in Iran (More) | Average price of gas in the US just above $3.94 per gallon; see state-by-state breakdown (More)

Peter Thiel-led Founders Fund to lead fundraising round for Halter, an AI-powered platform for cow herding; Halter's post-raise valuation would double to $2B (More

Whistleblower post accuses automated compliance startup Delve of creating false security and privacy reports; company, part of the winter 2024 Y Combinator cohort, denies allegations (More

Politics & World Affairs

ICE agents will deploy to major US airports today to assist with airport security operations amid partial government shutdown, White House says (More

Hawaii's Oahu island experiences worst flooding in over 20 years after days of heavy rain; more than 230 people were rescued as of Friday with damages exceeding $1B (More)

Sudanese army denies attacking a hospital in el-Daein in East Darfur; the strike killed at least 64 and wounded at least 89 others on the Muslim festival of Eid (More)

In partnership with LMNT

Up Your Game With LMNT

 

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 Etcetera 

 

More moons for Saturn brings grand total to 285.

 

What Americans find most (and least) immoral.

 

Ranking the brands capturing the biggest share of parents' wallets.

 

French bulldog tops US' most popular dog breeds in 2025.

 

Learn about the 1.5 million bats under Austin's bridge.

 

Mona Lisa's winding journey to the Louvre.

 

The psychology behind being instantly likable

 

Even angry sharks can have best friends.

 

In partnership: Salt has been misunderstood for far too long.*

 

Clickbait: The mystery of Varginha continues.

 

Historybook: Patrick Henry delivers “Give me liberty or give me death!” speech in Richmond, Virginia (1775); Elisha Otis installs first passenger elevator in New York City (1857); Psychologist and "The Art of Loving" author Erich Fromm born (1900); Singer Chaka Khan born (1953); Secretary of State Madeleine Albright dies (2022)

 

*Please support our sponsors.

 

"Love is a decision, it is a judgment, it is a promise. If love were only a feeling, there would be no basis for the promise to love each other forever."

- Erich Fromm, from "The Art of Loving"

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