Researchers watch and worry as balloons are blasted from the sky

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A NASA balloon launched over Hawaii in 2014 to test components that might one day be used to land spacecraft on Mars. Balloons are regularly used to test new designs and conduct scientific experiments. Bill Rodman/NASA

Bill Rodman/NASA

Angela Des Jardins never actually saw the alleged Chinese spy balloon when it made an appearance over Montana earlier this month.

“It was over Billings, which is a couple hours east of here,” says Des Jardins, a physicist at Montana State University in Bozeman.

But she’s

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