The International Olympic Committee on March 26-27, 2026 adopted a new eligibility policy that limits participation in female categories at IOC events to “biological females,” determined by a one‑time SRY gene screening. The rule, to take effect at the 2028 Los Angeles Games, bars most transgender women and many athletes with differences of sex development (DSD) from competing in women’s events, with narrow exceptions such as complete androgen insensitivity syndrome (CAIS). The IOC said the move is grounded in scientific advice about retained male physiological advantages and that the testing is non‑invasive (cheek swab, saliva or blood). The policy applies only to elite IOC events, not grassroots sport, and will replace the 2021 framework that left rules to individual federations. The announcement drew immediate political and public reaction: U.S. President Donald Trump and some conservative figures welcomed it, while more than 100 human‑rights and scientific organisations, plus France’s sports minister, condemned the return of genetic testing as ethically and legally problematic. Federations including World Athletics and World Boxing have already used similar screening, and legal challenges to the IOC’s approach are widely expected.

Iran-linked hackers claiming the Handala Hack Team said on March 27 they accessed FBI Director Kash Patel’s personal Gmail account and published photographs, a resume and a sample of more than 300 emails online. U.S. officials including the Justice Department and Reuters confirmed the account was compromised; the FBI said the material appears historical and contains no government information and that it has mitigated risks. The Justice Department had seized four domains tied to Handala on March 19 and the State Department is offering up to $10 million through its Rewards for Justice programme for information about the group. Western cyber researchers and U.S. prosecutors have previously tied Handala to Iran’s Ministry of Intelligence and Security and to recent intrusions, including a March attack on medical‑technology firm Stryker. Independent checks by outlets including TechCrunch verified cryptographic email headers for some messages, though the full scope and timing of the breach remain under review. Handala framed the leak as retaliation for the domain seizures and dedicated it to recent naval losses, underscoring cyber operations as part of the wider U.S.–Iran confrontation.

England kicked off World Cup warm-up preparations at Wembley on March 27, 2026, in a 35-man experimental friendly against Uruguay that combined squad auditions with controversy. Thomas Tuchel rested 11 established starters — including Harry Kane, Declan Rice and Bukayo Saka — while giving debuts to Everton’s James Garner and Manchester City goalkeeper James Trafford. Arsenal’s Ben White was recalled to replace the injured Jarell Quansah; White, who left England’s 2022 World Cup camp, was urged by Tuchel to “clear the air” with teammates. Real Madrid full-back Trent Alexander-Arnold was conspicuously omitted from the selection and posted “Real Madrid and nothing else,” prompting public debate and criticism from former England captain Wayne Rooney. On the pitch Uruguay defender Joaquín Piquerez suffered a stretchered ankle injury early and was replaced by José María Giménez, who took the captain’s armband. England debuted their new 2026 Nike away kit for the match, broadcast widely across free-to-air and streaming services. Tuchel defended his tactical, intensity-focused selections and said late decisions would shape his final World Cup squad for the summer tournament in North America.

The U.S. Treasury announced late March 2026 that President Donald Trump’s signature will be printed on all new U.S. paper currency this year, a first for a sitting president. Treasury Secretary Scott Bessent said the move is intended to mark the nation’s 250th anniversary and will place the president’s autograph alongside the Treasury secretary’s; it will remove the U.S. treasurer’s printed signature for the first time since 1861. Printing of redesigned $100 notes is slated to begin in June, with other denominations to follow and new bills entering circulation in subsequent weeks. The decision comes amid a broader push by the administration to place Trump’s name and likeness on government institutions and commemorative coinage — a 24‑karat gold coin bearing Trump’s image was recently approved by a federal arts panel — and has prompted criticism from Democrats, legal scholars and some numismatists. Treasury officials say statutory limits on portraits will keep bill faces unchanged and that the department has discretion over signatures; critics call the step unprecedented politicization of a longtime financial norm as Americans face rising costs and geopolitical tensions.

Kimi Antonelli secured pole position for the Japanese Grand Prix at Suzuka on March 28, lapping the 5.8km circuit in 1:28.778 to edge Mercedes team‑mate George Russell by 0.298 seconds. The result completed a Mercedes front‑row lockout — their third consecutive pole lockout of the season — with Oscar Piastri third for McLaren and Ferrari’s Charles Leclerc fourth. Lando Norris and Lewis Hamilton complete the top six; Max Verstappen was eliminated in Q2 and will start 11th after describing his Red Bull as "undriveable." Practice running had seen Antonelli top final practice (1:29.362) with Russell close behind, while Piastri topped Friday’s second session (1:30.133). The pair sit first and second in the drivers’ standings, Russell leading Antonelli by four points. Teams face amended qualifying energy limits for the weekend and continuing reliability concerns for McLaren and Aston Martin, factors likely to shape Sunday’s race and strategy at Suzuka.

A week of turmoil for Anthropic culminated in two related developments on March 26–28, 2026. Security researchers discovered nearly 3,000 unpublished assets in an unsecured Anthropic content management system, including a draft blog describing a new model—referred to as Claude Mythos or internally as Capybara—said to be the company’s most capable system yet and to possess “far ahead” cyber offensive capabilities. Fortune and other outlets reported Anthropic confirmed testing the model with early-access customers and warned of unprecedented cybersecurity risks; the leak sent cybersecurity stocks sharply lower (CrowdStrike, Palo Alto Networks and others down roughly 4–7%) and briefly weighed on cryptocurrency prices. At the same time U.S. District Judge Rita Lin granted Anthropic a preliminary injunction blocking the Pentagon’s designation of the company as a “supply chain risk” and a presidential directive to ban its tools from federal use. Lin wrote the measures appeared retaliatory and likely violated Anthropic’s First Amendment and due-process rights; the injunction is stayed for seven days to allow an appeal. The twin episodes have immediate implications for defence procurement, private-sector contractors and how governments handle frontier AI risks.