Hm, sounds nice!
I dont know something similar like this.
How about an US embassy or sth. like that in Iraq or somewhere else that is attacked by terrorists, the Specops spawn on the roof of the embassy, where are some Sattelite Dishes big antennas and radar stuff, an Cooling System and the US Flag ^^
The area is surrrounded with walls with barbwire.
The Terrorists spawn down infront of a pathway to the cracked-up embassy-door and see the Embassy building.
On its top the Specops spawn as I said and someofthem can oppose there as sniper.
The embassy area around the building is set up with some obstacles and cars and stuff.
Would be a nice map, especially if you use high-quality textures!
Some Pics to give a idea:
Sorry for big pics
