I like the look of it, for the most part, but I do have some suggestions (and a question). My main issue is with the space between the header stuff and content. As the skyline is partially faded out, it looks like it is just meant to be background, but there’s nothing in front of it. I would suggest moving your main content area up some, and maybe moving the skyline image up a bit too, behind the headline. Plenty of whitespace is usually a good thing, but I think you’ve got just a bit too much here.
As for the content area, I think it looks fine; it’s nice, clean, and simple. I think that maybe the shadow you have on the right of the “Mission, Officers, etc.” tab is a bit dark, especially in comparison with the lighter drop shadows you have in the content section. Maybe you could lighten it up some? That’s kind of a minor thing though, but it kind of jumped out at me.
I would like to ask, what is the significance of the orange band and the grey-blue box backgrounds for your navigation, behind “About” and “Photos” respectively? Are they just two possible states? I’d be better able to comment on them if I knew how they would be used in the live site.