30k feet up flying from granite mtn headed over Ben Lomand mtn. I could see all the detail on the black triangle. Invisibility was flickering on and off. I could see the black triangle clear as day and I could see the sliver/gray weird design on the black triangle. The picture I attached is exactly what I saw.

Data provenance: This record originates from the National UFO Reporting Center (NUFORC). The dataset originated from Hugging Face (kcimc/NUFORC).

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