Flight Simulator 2004: A Century of Flight, the ninth installment of the Flight Simulator series, came with historical aircraft such as the Wright Flyer, Ford Tri-Motor and the Douglas DC-3 to commemorate the 100th anniversary of Wright Brothers' first flight. It includes an improved weather engine, which provided true three-dimensional clouds and localized precipitation for the first time. The engine also allowed users to download weather information from real weather stations, allowing the simulator to keep the weather synchronized with the real world. Other enhancements from the previous version included better ATC communications, GPS systems, interactive virtual cockpits, and more variety in autogen (such as barns, street lights, silos, etc.).