Complex sentence: In Sept 2002 a $10.4 million test facility upgrade was announced, and when completed the upgrade would make Arnold Engineering Development Center a "one-stop" shopping center for aerodynamic and propulsion test customers by providing Mach 8 capability.
Split into simpler sentences: In Sept 2002 a $10.4 million test facility upgrade was announced. When completed, the upgrade would make Arnold Engineering Development Center a "one-stop" shopping center for aerodynamic and propulsion test customers by providing Mach 8 capability.