OpenAI’s president, Greg Brockman, right, was also named in Mr. Musk’s lawsuit.

The federal courthouse in Oakland, Calif., on Monday, when a jury decided that Elon Musk had waited too long to file his lawsuit against OpenAI.

In the trial’s first day of testimony in the OpenAI trial, Elon Musk said greed led Sam Altman, a founder of OpenAI, to pull the A.I. lab away from its nonprofit roots. OpenAI disagrees.

Elon Musk arriving at the Ronald V. Dellums U.S. Courthouse in Oakland Tuesday.

Demonstrators rallied in April against the use of generative artificial intelligence in New York City schools.

From Indiana to Idaho, a Backlash Against A.I. Gathers Momentum By Tripp Mickle

It was unclear whether Sam Altman was home at the time of the attack.

President Trump returning to the White House last month.

In January, Defense Secretary Pete Hegseth published a memo calling on A.I. to be widely integrated across the military and for A.I. companies to offer their technology without restrictions.

Mayor-elect Zohran Mamdani named Kamar Samuels as New York City’s schools chancellor. He starts on Thursday.

Chief Justice John G. Roberts Jr. in May. By tradition, he releases his report about the state of the nation’s courts on the last day of the year.

Justice Neil Gorsuch with former Justice Stephen Breyer at a memorial event for Antonin Scalia last year during a Federalist Society convention in Washington.