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Welcome to Tech News Briefing. It's Friday, November 24th. I'm Julie Chang for the Wall Street Journal.

Companies are working on wearable devices that can read a person's brain activity and then use that

data to help improve their focus and productivity.

The Niella Hernandez wrote about this for the Wall Street Journal and will join us later

in the show to tell us more about how these devices about this

all the Wall Street Journal and will join us later in the show to tell us more about how these

devices work. Plus European users can pay for an ad-free version of

Instagram but is it worth it?

But first, Sam Altman is back at the helm of Open AI, just days after he was ousted by the board.

The ordeal led to chaos for the board as nearly all of Open AI's roughly 770 employees

threatened to quit, and Altman was hired almost immediately by the startup's biggest investor

Microsoft.

...