8000m altitude limit?

[Lixma]

Apologies if this has been discussed before.

I've been trying to fly above the wispy cloud layer in CoD which appears to be fixed at 8000m. I cannot do it in any of the fighters. The best I can do is wander around with the nose tickling the wispy veil in the manner of a goldfish swimming near the surface of the water. But I cannot induce any aircraft to break this barrier.

Why?

It's well known that the fighters in CoD are not reaching their historical altitudes but it has been the received wisdom that they just need their FM tuned. But let me introduce a terrible idea....

8000m is the ceiling of CoD's universe. No amount of FM tuning will allow a fighter to break 8000m because there is nothing beyond 8000m! The wispy cloud layer at 8000m is CoD's 'roof'.

Oooohh, the drama! But it's very suspicious, nonetheless.

So has anyone broke on through to the other side? If so could they provide a screenshot?