General Electric (GE) announced it struck a deal with Clean Energy Fuels (CLNE) Tuesday to sell two liquefied natural gas systems as Clean Energy looks to expand its gas fueling stations. Clean Energy -- famous for its largest investor, former oil man T. Boone Pickens -- is building a network of liquefied natural gas fueling stations across the country for long-haul truckers. GE expects natural gas liquefying equipment to become a $1 billion market