How to find Airport Extreme Mac Address using Airport Utility 6.0

Hi- I'm using the 6.0 version of the Airport Utility and as in typical Apple fashion, they've elimitated or moved quite a few features from the old version. (Apple what are you doing? This isn't making it easier for anyone...)

Anyway, I can't seem to find how to get a base stations mac address. In the scenario I'm using, I only have one airport extreme connected. If I click on that device in the Airport Utility, it shows LAN and WAN IP, Serial and firmware version- but where's the mac address? How do I find that?