For everyone who doesn't know it:why have u covered the hangars in grass?
This is to prevent air-based attacks. Because everywhere around a hangar is grass, it's much harder to see the hangar and so it's much harder to hit and destroy it.
In fact in a hangar are airplanes who could start a counterattack. So it's a stratetic move to destroy the hangars first. But if you can't see them ...
BTT:
I haven't tested it 'til yet and I prefer to download it from somewhere else. The map isn't the smallest and I have a slow connection ...
Greetz
anihex