Baidu has been testing driverless taxis but has now partnered with state-owned automaker BAIC Group to try and commercialize a robotaxi service in China.
Amazon didn't name call out any social media platforms by name, but recent investigations have found that fake review groups are prevalent on Facebook.
"I look at the tech regulation that's being discussed, I think there are good parts of it. And I think there are parts of it that are not in the best interests of the user," Cook said.
Holmes is facing federal charges in connection with wire fraud and conspiracy to commit wire fraud regarding her now defunct healthcare tech start-up, Theranos.
Roblox shares fell as much as 7% in after-hours trading Tuesday after the company reported a decline in users and their spending on the gaming platform in May.
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