Verisign shut down under court order from the State of Maryland.  The domain name was purchased through a Canadian registrar.

But at the end of the day what has happened is that US law (in fact, Maryland state law) [has] been imposed on a .com domain operating outside the USA, which is the subtext we were very worried about when we commented on SOPA. Even though SOPA is currently in limbo, the reality that US law can now be asserted over all domains registered under .com, .net, org, .biz and maybe .info (Afilias is headquartered in Ireland by operates out of the US).

This is no longer a doom-and-gloom theory by some guy in a tin foil hat. It just happened.

It may not be all that big of a precedent, but it just goes to show how much power the US already holds over the Internet.