I can't believe it. I typed in nasa.gov in the address bar - blank page.
Amazing - the organization in the world that I think most defined the tech-weenies ethos of the 21st century and their domain does not resolve without the www.
Note - Firefox seems to rewrite this internally (at least it immediately switches to www.nasa.gov and HTTPLiveHeaders does not show a redirect), but in IE, Chrome and Opera it fails.
Kind of blows me away to see this in 2012.
I wonder how many others who really, really, really should know better are still doing this.