No, that's the link to the twitter article. The article that went missing/broken is "StreamInsight - The Development Models" which was URL http://www.sqlservercentral.com/articles/StreamInsight/70160/ which was the original Part 3 article ("Pulling real-time data from Twitter using StreamInsight" was originally listed as Part 4 of the stairway series). The original part 3 article had a description of "An introduction to the three different development models in StreamInsight. How to use them and where."