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This is The World in Brief, from The Economist.

Our Top Stories Our from The Economist. Our top stories.

Donald Trump said he might impose tariffs on countries if they don't, quote, go along with Greenland.

Several European leaders have spoken out over the American president's threats to seize Greenland,

urging a larger NATO presence in the Arctic.

France's finance minister said that if America were to take the self-governing territory,

which is part of Denmark, it would be, quote, crossing the line.

OpenAI will target users of Chat GPT with personalized advertisements as it faces mounting pressure

to make money from its chatbot.

Sam Altman, the company's boss, once described the strategy as a, quote, last resort.

But the startup has been burning through cash while making large

investments into data centers and IT infrastructure. The ads will be tested across free

and lowest paid tiers in America. Maria Corina Machado said she still believed Venezuela

was on track to replace its, quote, criminal regime

after meeting Donald Trump on Thursday. The opposition leader's visit to the White House did not

...