'Donuts-on-a-Rope' Contrail Suggests Flight of Classified Aircraft
Credit: PHIDIAS CINAGLIA PHOTOS
After a long absence, what may be a classified aircraft powered by an impulse-type engine appears to be back in the air again. Its distinctive "donuts-on-a-rope" contrail was spotted recently above Utah's Wasatch Mountains. More than a decade ago, cotton-ball-like contrails were spotted and...
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