To barksdale Air Force base. After challenger, nasa had a Contingency Plan in case there was a shuttle accident. I never really imagined that it would happen. With columbia, we had people who had experience with Accident Investigation from the military, navy, and Air Force on the team. I came to the investigation as a Helicopter Pilot who knew something about doing Accident Investigations. I did not come to the investigation as a space shuttle expert. I literally knew nothing about how the shuttle was put together. We needed nasas help because by definition, everybody who came in as an external part of the Investigation Team is not a space shuttle expert. There was years of Shuttle Program Knowledge that we needed to learn very quickly