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Welcome to Tech News Briefing.

It's Tuesday, September 23rd.

I'm Katie Dayton for the Wall Street Journal.

Changes to an employment visa that's popular among tech companies have rattled the industry,

leading to frantic phone calls, legal briefings, and last-minute flights back to the US.

We dive into what happened when Trump overhauled the H-1B and ask what comes next.

Then we catch up with Duolingo, the language learning app that's navigating the waters of investing in AI without aggravating its human staff and users.

But first, President Trump rocked the tech world late last week with a sweep of changes to the H-1B

visa, a program that allows American firms to hire highly skilled foreign workers.

The visas become popular among tech companies, many of which went into crisis mode when the Trump

administration said it would add a new fee to H-1B applications.

Our reporter Ray Smith spent the weekend reporting the story.

So, Ray, what reasons did Trump give for making these sweeping changes to the H-1B?

One of the reasons is they felt that this was an unfair system to

U.S. workers. The idea was that we have people coming into this country basically taking American

jobs away from highly skilled Americans, and that was the premise behind why they feel like they

need to crack down on a system that they believe was being used by tech companies

to avoid hiring American workers.

Can you explain which kinds of companies are affected most by these changes?

It's primarily tech companies.

...