50th
When I type "nasa.gov" into my browser, it gives me a security warning and asks if I am sure I want to visit nasa.gov. I find this quite amusing, given that, oh, I work for NASA and am trying to get to the site at work. Sigh. In any case...
Happy 50th Birthday to NASA! The agency officially began operations on October 1, 1958 after President Eisenhower created it months earlier via the National Aeronautics and Space Act. The rest is history.
I get a security warning when I try to go to my company's wiki site, actually. I always thought that was ironic.