World order is changing. China is a rising military power. People may even see foreign spy aircraft (e.g. Chinese weather balloons) over US airspace. The DoD would rather you believe it's aliens. This kind of propaganda works great on older boomers in particular because they've been conditioned to believe it all their life.
The US military is not able to coverup something like a crashed alien spacecraft. They couldn't even stop a dozen men with box cutters from crashing planes into buildings. I would not be surprised in the least to find out that the 9/11 conspiracies were funded by the DoD—probably by the same people doing this nonsense now. Again, "they" would rather you believe in a supremely powerful government with space lasers than have their true incompetence unmasked.