The Allegheny County Airport Authority (ACAA) operates both Pittsburgh International Airport and Allegheny County Airport and is dedicated to the safety and security of passengers, employees and all other users of the airport. The Airport Authority oversees all aspects of airport operations including new development, environmental issues, airline and tenant management as well as airfield operations. ACAA employs 465 people to operate and maintain Pittsburgh International and the Allegheny County airports. Pittsburgh International Airport serves more than 8 million passengers annually on 15 carriers. 2017 Air Transport World Magazine Airport of the Year!