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Artificial intelligence experts and industry leaders, including Tesla CEO Elon Musk, are calling on developers to hit the pause button on training powerful AI models.

The U.S. Department of Transportation is investigating Elon Musk’s brain implant company, Neuralink Corp., after an animal rights group said it obtained emails suggesting the startup did not follow proper procedure when shipping possibly hazardous materials.

SAN FRANCISCO — A jury on Feb. 3 decided Elon Musk didn’t defraud investors with his 2018 tweets about electric automaker Tesla.

Elon Musk’s lawyer told a jury the Tesla Inc. chief executive officer has been “falsely accused” of defrauding investors and argued that the billionaire is not a “fire-breathing tweeting monster.”

Tesla Inc. investors lost $12 billion over 10 days as a result of Elon Musk’s famous tweet in 2018 that he had “funding secured” to take the company private, a witness testified at a trial over the CEO’s liability.

The U.S. Justice Department has requested documents from Tesla Inc. related to its Autopilot and “Full Self-Driving” features, according to a regulatory filing.

SAN FRANCISCO — Elon Musk returned to the stand for a third day on Jan. 24 in federal court in San Francisco to testify in a trial stemming from a class action lawsuit.

Elon Musk oversaw the creation of a 2016 video that exaggerated the abilities of Tesla Inc.’s driver-assistance system Autopilot, even dictating the opening text that claimed the company’s car drove itself.

A Silicon Valley judge began questioning potential jurors Jan. 17 to hear allegations that Elon Musk cheated Tesla investors by claiming in a 2018 tweet that he had lined up financing to take the electric automaker private.

A tweet from Elon Musk indicating that Tesla might allow some owners who are testing a “Full Self-Driving” system to disable an alert that reminds them to keep their hands on the steering wheel has drawn attention from U.S. safety regulators.