Photo: Michael YonReporter and former Green Beret Michael Yon took a series of intriguing photos of glowing rot... ...phenomenon, striking as it is, has no name - and Michael decided to name it the Kopp-Etchells Effect, as a... ...ph Etchells, who died in battle.The full s...
https://www.neatorama.com/2009/09/01/the-kopp-etchells-effect-eerie-halo-of-a-helicopters-rotor-blades-in-a-dust-cloud/
The Kopp-Etchells Effect: Eerie Halo of a Helicopter's Rotor Blades in a Dust Cloud...
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