Pretty sure the pentagon denied the report that they are manned aircraft.
However, let’s assume they are US military and we are testing things out, which is very plausible. The question becomes, why are we testing this over a major populated area where it’s being seen by thousands of people and being talked about throughout national and global media? Typically, you would expect for this to occur in less populated areas and for the testing to be a little bit more “under the radar” so to speak.
If the US is doing the testing, and they’re making it obvious, but still aren’t admitting to it, what is the end goal here? They could have avoided this if they wanted to, but instead, they’re making national news of it. Kind of goes in line with the steady and increasing talk about aliens/UFOs within the government and media as of late. Seems like they’re slowly building and setting the stage for something….or not
