AAAAAAAAAAAH Free Skies.
If someone converts a plane and a zeppelin into working .pofs, I will make a 1 mission demo where you shoot down Hitler over and over again.
I spent an entire day writing up that alternate universe history for this and am excited to see it go places, but I don't do modeling or model conversion or coding or scripting which are all things that this needs.
I did see a video of bullets having their trajectories altered by gravity recently (at least I think that's what it was) and we do have a falling debris script that mostly works, but I don't think anyone has made a successful atmospheric flight system that the AI can use as of yet.