The Tucson Airport Authority (TAA) is an independent, non-profit organization operating Tucson International Airport and general aviation reliever Ryan Airfield. TAA has sustained its operations since its origin in 1948 from airport generated revenues without the use of local taxes, and continues to invest millions of dollars each year in safety, security and facility infrastructure that drives job creation and economic activity for the benefit of Tucson and southern Arizona. The two airports currently support 17,000 jobs and house more than 100 tenants, and serve a diverse mix of both aviation and non-aviation related businesses, as well as military and government operations.