It is hard to identify with just those letters, but note the Futura-style "a", and the hook on the small "t", which is not Futura. Also note the Futura-style "g" without the lower loop. There are literally tens of thousands of fonts available, but I think I have identified it. It is called "Radikal" and is available for license at myfonts.com for $30. Luckily there is a way of previewing custom text. Compare these:
Ding, Ding, Ding, we have a match! The first part of it is Radikal Medium, and the ".gov" part is Radikal UltraThin. But look at the lower-case g, it doesn't quite match. In the logo, the g has a more rounded top, so it could be some other logo.
But that is the only part of the website that uses that font. Because the font has a bizarre k. Check this out:
Now you know the rest of the story.