From Popular Mechanics on Skunk Worls and their projects.
SKUNK WORKS MAGIC by Jim Wilson
Investigation Casts Light on the Mysterious Flying Black Triangle
NIDS researchers contend that these type vehicles are lighter-than-air, blimp-style craft of the U.S. military's making. Likely powered by "electrokinetic" drive, the lifting body-shaped airships have been skirting the skies from perhaps the early to mid 1980s.
stealth blimps
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