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A collage of Elon Musk (left) and Twitter cofounder Jack Dorsey.
Elon Musk was able to swoop in to buy Twitter after Jack Dorsey's hands-off leadership style left an opening.
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Jack Dorsey Donald Trump
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A Twitter logo disco ball in a party scene
Billionaire introvert Jack Dorsey hosted a 3-day Twitter retreat, known as #OneTeam, for 3,500 employees in the summer of 2018.
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A group of people standing and sitting together at a sports game
Jack Dorsey, center, wrote a "Satoshi" t-shirt to the Super Bowl.
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Musk + Donut
Elon Musk loves donuts. The Twitter CEO recently tweeted that he eats a donut every morning.
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Tech billionaires living forever
From Sam Altman (from top left, clockwise) to Peter Thiel, Mark Zuckerberg, Jeff Bezos, and Sergey Brin, many of the world's wealthiest billionaires seem to be on a quest for the fountain of youth.
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Jack Dorsey speaking at a crypto-currency event
Jack Dorsey is getting rid of annual performance reviews and performance-improvement plans, or PIPs, at his company, Block.