Big uproar in Big Tech.

• Big uproar in Big Tech.

Thousands of Google employees signed a letter protesting the company’s role in a Pentagon program that uses artificial intelligence to interpret videos and could be used in drone strikes.

Amazon is the latest in a long line of companies that President Trump has denounced on Twitter, contributing to a drop in the online retailer’s stock. We checked the facts behind some of his criticisms.

And Mark Zuckerberg, Facebook’s chief executive, will testify before Congress next week on the company’s handling of sensitive user data. (Facebook raised its estimate of how many peoples’ data was improperly used by a consulting firm tied to President Trump, to as many as 87 million.)