In 1987, with the financial backing of USAir (then the dominant carrier in Pittsburgh), work commenced on a billion-dollar expansion. On October 1, 1992, the new complex opened, with operations having been transferred overnight from the old terminal. (The old terminal was kept until 1999 to house remaining operations offices.) The new terminal had numerous innovative features, including an AirMall, with more than 100 retailers and eateries (more defined in Passenger Complex section of this article). The new Landside/Airside design construction eliminated the need for connecting passengers to go through security more than once.