Character.AI collected millions of users, making it a very appealing acquisition. Google took a unique route to "acquiring" it, hiring away its founders and licensing its technology. Now Character.AI is filing for bankruptcy. Here's what to know.

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As European defense spending takes off, just about half of the funding in Europe's defense tech industry is coming from American investors this year. One reason why: European investment firms have restrictions on how they can invest.

(Image credit: Efrem Lukatsky/AP Photo/Efrem Lukatsky)