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Blockchain's hallmark is decentralization. Data can be shared among a distributed network of computers with no need for middlemen. Once recorded in a blockchain-based ledger, data is hard to tamper with.
Boeing's President and CEO Dennis Muilenburg said later on Friday that the company is addressing the committee's safety recommendations and working to enhance the safety of the 737 Max jet "to prevent the flight control conditions that occurred in the accident from ever happening again".
Bill Gates: Jeff Bezos overly optimistic on drones, but they will have a positive impact
Bolsonaro's son Eduardo, a federal congressman who also attended the meeting at Mar-a-Lago, wrote on Twitter that he was on his way to get tested. Four days ago, he posted a photo of himself standing behind the US president, next to Trump's daughter, Ivanka, and close to his son-in-law, Jared Kushner.
Bio is currently under 14 days of self-isolation and will be working from home, the president's spokesperson said.
来源：资阳报