Cover Story

Mystery of the “damn things”

By Jan Tegler and Cat Hofacker

November 2019

In a handful of incidents that go back to 2004, U.S. Navy fighter pilots and weapons officers have reported detecting strange objects maneuvering quickly with unheard of agility around their aircraft. The Navy professes to be as mystified as anyone. Jan Tegler and Cat Hofacker went searching for possible explanations. Here is what they found.

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Engineering Notebook

Quest for 90,000 feet

By Keith Button

November 2019

Creating a piloted glider that can soar into the stratosphere on waves of air rising over the Andes required some creative safety innovations. Keith Button tells the story of Perlan 2.
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