Friends, I'd like to start a thread about the most famous and widespread Internet operational issues, outages or implementation incompatibilities you have seen. Which examples would make up your top three? To get things started, I'd suggest the AS 7007 event is perhaps the most notorious and likely to top many lists including mine. So if that is one for you I'm asking for just two more. I'm particularly interested in this as the first step in developing a future NANOG session. I'd be particularly interested in any issues that also identify key individuals that might still be around and interested in participating in a retrospective. I already have someone that is willing to talk about AS 7007, which shouldn't be hard to guess who. Thanks in advance for your suggestions, John