Innovators

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  Security

  A Dad Who Fought Back

  When Brian Hart lost his son to a roadside ambush in Iraq, he channeled his grief into creating an affordable robot that defuses bombs so the troops don’t have to
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  Health

  Making All the Right Calls

  An engineer and his students turn the cellphone into a lifesaving medical imager
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  Engineering

  The Bamboo Builder

  Yan Xiao found a way to turn China’s abundant and fast-growing bamboo fields into buildings and bridges
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  Aviation & Space

  The DIY Flier

  A New Zealand inventor has spent most of his life on the ultimate garage project: a jetless jetpack that will carry him hundreds of feet in the air. Now he’s ready to fly