Misleading. Personal accounts NOT supported.
The US Census Bureau directed me to the web page for the "free" ArcGIS Explorer app (this one). Search for "esri arcgis explorer" and youll find the corresponding web page. I was then faced with a login ... so I created an account. Only AFTER that, upon trying to login to use this app, was I informed that "personal accounts are not supported." Very disappointed. I could "sign up for a 60 day free trial" but now I feel strung along.
RobWilco about Explorer for ArcGIS