Tesla teases new Model Y car as cheaper Model 3 nears production

Chief executive Elon Musk shows off image of new car and semi-truck, and gets ready for mass-market electric vehicles

Can Tesla downshift from $130,000 SUVs to mass market electric cars?

After unveiling the luxury Model X, Elon Musk’s company has a big challenge ahead as it aims for a bigger audience with its Model 3, promised for 2017