Aurora TR-3B

So I did some grocery shopping, walked outside, saw something weird in the sky that I don't normally see, and it piqued my curiosity about UFOs and the sort. One of the many strange things that seems to be regularly sighted here in Pittsburgh is an odd, triangular-shaped craft that flies relatively low and is absolutely silent. I saw a few comments suggesting that the crafts in the YouTube videos I watched were the top secret Aurora TR-3B.

Apparently this craft indeed does exist, but the websites I have looked appear to be conspiracy theorists. I'm no tinfoil hat wearing space alien guy, but I know weird shit when I see it, and this was definitely something out of the ordinary. My question to you all is have you seen this thing anywhere where you live? Because apparently it has popped up in numerous cities.