 This Tucson plant is still in operation under the ownership of Raytheon Co.

Howard Hughes donated Hughes Aircraft to the newly formed Howard Hughes Medical Institute (HHMI) in 1953 allegedly as a way of avoiding taxes on its huge income.The next year, L.A. "Pat" Hyland was hired as vice president and general manager of Hughes Aircraft; he would ultimately become company president and CEO after Howard Hughes' death in 1976.Under Hyland's guidance, the Aerospace Group continued to diversify and become massively profitable, and became a primary focus of the company.