This is really weird but it at every airport I go to there are no terminal buildings. There is just the push back truck and maybe a baggage truck and thats it. There are no buildings, no jetways nothing. What is going on?

either your video card or your graphics driver does not support bump maps and reflections (or you have removed the respective dds files as part of the countless tweaks posted here). the terminals are there, you just can't see their skin

Where do you have the Scenery Density slider set? Move it farther to the right. R-