On a recent trip to Pittsburgh to meet with tech startups, I stopped by Google's office in the Collaborative Innovation Center on the campus of Carnegie Mellon University. In an interview, Google engineering manager Kamal Nigam explains why Google came to Pittsburgh and what it's doing there.

Tapping into the CMU talent pool, Google employs about 75 software engineers in Pittsburgh. Among other things, they work on Google Sky, the stars-and-galaxies plug-in to Google Earth. Here's the interview.

For more on the tech scene in Pittsburgh, including more video, see my earlier post, "Penguins, Pirates, Steelers, And Startups."