That can have many reads. For example from the article:
"The report followed a leak of military footage that showed apparently inexplicable happenings in the sky, while navy pilots testified that they had frequently had encounters with strange craft off the US coast."
I read it as, "We detected several times a military aircraft, that a country expected to be undetectable, flying over our territory, we send you the proof that such plane could have been knocked down; stop doing it" at same time they don't admit such other country violated the territory having to rise up a conflict.
I think the concerning thing is that could well be the case - and there is still a very large number of people in here just saying "nope this guy is crazy".
The group of people who just off-hand deny this is happening is kind of staggering.
"The report followed a leak of military footage that showed apparently inexplicable happenings in the sky, while navy pilots testified that they had frequently had encounters with strange craft off the US coast."
I read it as, "We detected several times a military aircraft, that a country expected to be undetectable, flying over our territory, we send you the proof that such plane could have been knocked down; stop doing it" at same time they don't admit such other country violated the territory having to rise up a conflict.