Associated Press: General Motors is knocking 13 percent off the sticker price of the Chevrolet Volt electric car as it tries to keep pace with rivals in the market for plug-in vehicles. The automaker said Tuesday that the 2014 Volt will start at $34,995, including shipping $5,000 less than the current model. The new model is scheduled to reach showrooms late this summer. Sales of electric vehicles are rising, but theyre still a small piece of the overall industry. Automakers have been forced to cut prices or...