Tesla trucks: semi to be shown in Sept, pickup in 18-24 months

2012 Tesla Model S beta vehicle, Fremont, CA, October 2011Relative few companies regularly make major announcements via their CEO's Twitter account, but electric-car maker Tesla is different. From software updates to dates for new product lines, tweets from Tesla's CEO Elon Musk routinely make news. And so it was this week, when Musk announced the months in which the company plans to reveal designs for...