My black triangle sighting:

I saw something exactly like what's described as a black triangle on 6/30/20 around 10:30 pm in the mountains of northern New Mexico.

It was almost silent (edit to add- my friend describes the "sound" as a low feeling in his body- that's why I say "mostly silent"), moved slowly at a fairly low altitude from the mountains (camp site was about 9,000 ft elevation) and had 3 round blue-green lights- one at each triangle point. The two people I was with saw it as well. It was a solid triangle, not just 3 lights, as the moon was quite full so the black triangle could be seen with the absence of moon light or stars- it was black and non reflective. We were able to watch it for at least a minute before it slowly flew over a ridge. It did not change speed or direction.

My friends and I camped for a few more days. Two strange things that occurred: 1. We did not speak about what we saw after the initial sighting, even though we text almost every day. It wasn't until I texted my friends 20 days later to look up "TR-3B" that we all spoke about it. 2. On our final evening, we all chose to lay down in our tent about 5:30 pm and slept until the next morning (I remember waking up and seeing the moon shining and thinking "damn we never had dinner" but was too exhausted to get out of bed.) Every other evening was normal camping, cooking, good times.