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A major cloud outage Monday disrupted services across the globe, offering a reminder of how dependent we are on just a few tech giants.

“Amazon Web Services is one of the foundations of the modern internet,” said Shaddi Hasan, assistant professor of computer science at Virginia Tech. “When Amazon breaks, that takes down so many of the services that we use every day.”

Hasan said running a cloud infrastructure is expensive and complex, which is why only a few companies lead the pack.

“There’s only a handful

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