An entire country has been pulled off the internet. I admit I haven't been following the events in Syria as close as I should have been, but yesterday I found out that the Syrian government appears to have shut down as much of the internet as they possibly can. As of today, that includes some smaller internet services, not just the five major ISPs. I've been following this liveblog on the topic:
Starting at 10:26 UTC on Thursday, 29 November (12:26pm in Damascus), Syria's international Internet connectivity shut down. In the global routing table, all 84 of Syria's IP address blocks have become unreachable, effectively removing the country from the Internet.
Google is doing their part to help out, linking up Twitter with phone service so that anyone with a phone line can get voice messages out. That news is via cnet, who also posted a video of the internet service being cut of, connection by connection, created by CloudFlare.