It is "broken." You're right that "it's just a convention that they don't use, but you expect." But it's a convention that must prevent a handful of people from

It is "broken." You're right that "it's just a convention that they don't use, but you expect." But it's a convention that must prevent a handful of people from accessing their website each day, or at least causing them to Google "NASA" in confusion. There's no valid technical reason for doing this. It's a serious usability/findability fail.