DeepSeek is threatening to upend the global AI supply chain. And it has also drawn shock and awe over how an engineering graduate who has never studied or worked outside of mainland China, pulled off such a feat.

Read more about DeepSeek's founder here: https://bloom.bg/4htKBDc

📷: Justin Sullivan/Getty Images

Apple has been secretly working with SpaceX and T-Mobile US to add support for the Starlink network in its latest iPhone software, providing an alternative to the company’s in-house satellite-communication service. More here: https://bloom.bg/40C8lOz

📷: Dhiraj Singh/Bloomberg

EXCLUSIVE: Microsoft and OpenAI are investigating whether a group linked to China's DeepSeek obtained OpenAI's data. More: https://bloom.bg/40QnvB7

Holders of H-1B and other work and student visas are now trying to navigate what Trump’s new policy on birthright citizenship means for their families. Read more here: https://bloom.bg/4hxgv1z

📷: Montinique Monroe/Bloomberg

🎙 When things get uncertain, investors flock to gold. Last year, the precious metal hit record high after high, helped by demand from Chinese consumers.

Find out why on the Big Take Asia podcast here: https://link.podtrac.com/jxfy2rhy

DEVELOPING: A PSA Airlines Bombardier jet has collided mid-air with a helicopter and crashed near Washington Ronald Reagan Airport https://bloom.bg/3PUQBJu

A regional jet flown for American Airlines collided in midair with a military helicopter in Washington, DC, halting operations at Ronald Reagan Washington National Airport and prompting a search and rescue operation in the Potomac River. Latest updates: https://bloom.bg/4hf6TsO

📷: Alex Wroblewski/Bloomberg

US officials are probing whether DeepSeek bought advanced Nvidia chips through third parties in Singapore, circumventing US restrictions, people familiar with the matter said. More here: https://bloom.bg/3EhRSHX

📷: Andrey Rudakov/Bloomberg

Here's what to know about President Trump's imposition of sweeping tariffs on US trading partners:

- The White House announced plans to slap 25% tariffs on Mexico and Canada and 10% on China starting Tuesday: https://bloom.bg/40XeC9b

- Canada will place 25% counter-tariffs on C$155 billion ($107 billion) worth of American-made products, also starting Tuesday: https://bloom.bg/40yz4vC

- Mexico’s president called for retaliatory tariffs and other non-tariff measures on the US while also opening the door for the two sides to cooperate on security and public health issues: https://bloom.bg/3CnLZIR

- China vowed to take “corresponding countermeasures” against the US but didn’t specify them; it also plans to file proceedings to the WTO: https://bloom.bg/40HJ3i3

For decades US companies have benefited from the regional economic alliance with Canada and Mexico.

President Donald Trump's move to impose tariffs on the two countries swings a wrecking ball through the partnership that made the US the world's economic powerhouse. Read the Big Take here: https://bloom.bg/3Q0yS3n

📷: Bryan Dozier/Middle East Images/AFP via Getty Images

LATEST: President Donald Trump said the US would stop sending aid to South Africa over its land expropriation policies, sparking a selloff in the rand. More here: https://bloom.bg/40U6XZ7

LATEST: US President Donald Trump said he will “definitely” place new tariffs on the European Union, reiterating complaints about the US trade deficit with the bloc and what he sees as insufficient EU imports of American cars and agricultural products. More here: https://bloom.bg/3ElOM5S

North Korea lashes out at US Secretary of State Marco Rubio’s recent characterization of Pyongyang as a “rogue” state. More here: https://bloom.bg/40JFsAk

Elon Musk said his “DOGE team” of government efficiency enforcers is shutting down payments to federal contractors, suggesting that the world’s richest man may have access to sensitive systems used at the US Treasury Department. More here: https://bloom.bg/40Ibo85

📷: Chip Somodevilla/Bloomberg

LATEST: Ether and memecoins plunge as traders respond to Trump's tariffs by slashing positions in a range of tokens. More here: https://bloom.bg/42Ig7Jx

Apple lambasted the EU’s Digital Markets Act after the first known porn app for the iPhone arrived on the company’s devices in the region. More here: https://bloom.bg/4jLP7iC

📷: Victor J. Blue/Bloomberg

NEW: Indian Prime Minister Narendra Modi has been invited to meet with Trump in Washington next week, a White House official says. More here: https://bloom.bg/3CEimTz

The global battle against unauthorized vapes is already a messy one. Donald Trump’s return to the White House promises to make things even more complicated. Read The Big Take here: https://bloom.bg/4hL2n5b

📷: Nico Brausch

President Donald Trump pledged hundreds of billions in tariffs to remake the global economy and target even his closest neighbors.

But so far, it’s been more Art of the Deal than a revolution. Here's why: https://bloom.bg/40FXYcN

El Salvador’s president made an extraordinary offer to Donald Trump as the US seeks to ramp up deportations: the tiny Central American nation is willing to accept convicted criminals of any nationality, including American citizens. More here: https://bloom.bg/4aLZe2G

📷: Juan Carlos/Bloomberg

BREAKING: China slaps 15% tariffs on US coal and LNG moments after Trump's new tariffs come into effect. Follow our live blog for updates and analysis: https://bloom.bg/3CDK42S