[DugwayDuke]

From the article: “On Sunday, administration sources began to tell reporters that, yes, the Chinese incursions had happened during the Trump years but that nobody knew about them. And not just nobody in the sense of the public. Nobody in the government’s vast military intelligence and surveillance apparatus noticed them, either. They all missed the giant Chinese balloons.”

If they weren’t detected then, how do we know they existed?

[WhoisAlanGreenspan?]

Right. If they had no way to detect the Trump era balloons, how did they detect this balloon? And if they had no way to detect balloons at the time, how would going over any data later magically find what they missed years ago?

Even if some portion of this trial balloon fish tale were true, it's obvious the message is Trump did it too so Biden isn't that bad.

[GingisK]

If they weren’t detected then, how do we know they existed?

That is the question that shows they are making crap up as they go along.