Baltimore/Washington Int'l Airport is expanding with a huge new terminal just for Southwest Airlines. They also just finished completeing a huge 15 story parking garage. I think it is 15 stories or something close to that. IT'S MASSIVE!!!!! When i flew out of BWI this summer, there were aboue 10 planes waiting to take off on the runway at one time. VERY BUSY AIRPORT! I do think what would be cool with airports in Simcity 4, is that they could still be an international airport or landing strip but could be upgraded with a new terminals or another runway or a helicopter landing pad! Whatever was needed.