Excluding governmental and education sectors, the largest single employers in the state tend to be in the aeronautical sector. The building of Tinker Air Force Base and the FAA's Mike Monroney Aeronautical Center in Oklahoma City, and American Airlines Engineering center, Maintenance Facility and Data Center in Tulsa provide the state with a comparative advantage in the Aeronautical sector of the economy. AAR Corporation has operations in both Oklahoma City and Tulsa, and The Boeing Company and Pratt & Whitney are building a regional presence next to Tinker AFB.