car maker testla went on the market this week. it is the first american ipo maker since ford in 1976. testla is about to have competition with nissan and chevy rolling out models this fall. cnn alison's cassa investigates. >> it is running. >> reporter: silent on start-up. they are soon to be at a dealer near you. electric cars. add executive, mark fabel, couldn't resist. >> reporter: what made you buy