Blue and Green: Volkswagen has instructed U.S. dealers to halt sales of 2015 diesel cars after regulators discovered software it designed for the affected vehicles gave false emissions data. The company now faces financial and criminal penalties. The U.S. Environmental Protection Agency (EPA) said on Friday the company had installed illegal defeat device software to cheat emission tests. The software allowed its cars to produce up to 40 times more pollution than permitted. The EPA added that Volkswagen could...