Not just caught on camera - risk crashing it and tech falling into the wrong hands. Flying it for extended periods (sometimes hours) over cities.
When there are readily available open spaces owned by the military which to test these craft in. It's odd how known craft WERE only tested in those
areas (such as the stealth bomber), but these secret huge triangles.. are tested over major cities.
Not to mention these sightings happen over foreign soil. And the same excuse is used.. even though it makes even LESS sense. There is no reason or
need to test expensive, secret tech over populated areas, and even more reasons to not do so over foreign or even enemy soil. Not to mention the
craft seen in sightins defy physics - we don't have craft of that size, that can fly at those speeds, silently.. which is an important point. The
lack of noise is critical, and people ignore these. With our current technology, the larger the object we have to keep up, the noisier the thing is.
Even your "stealth" jets are quite loud when seen in person. The only thing of the reported size of some UFOs that can stay silent are blimps.
However, these only move at 53 mph (or we'll grant a bit more speed for the super-secret tech versions that seem to be everywhere). However, the
objects sighted are certainly moving much faster than that.
And while yes, humans can be unreliable, they are not THAT unreliable. People do not give eyewitnesses, especially when there are many of them, near
enough credit. I can identify within seconds, pretty much anything I see in the sky, as could most here, I'd wager. I've seen dots and weird
shapes, and I just wait a few seconds, and between lights, speed, what it looks like shapewise, etc.. I can figure what it probably is. If a jumbo
jet or a weird looking plane were flying overhead, I don't think I'd be so.. off.. in my sighting, that I'd report I saw a huge triangular craft,
several hundred feet across, with large lights on the underside.