Tesla is set to unveil its most affordable electric car ever next weekend, but Chevrolet stole a bit of its thunder by rolling out the first pre-production Bolt EV. Meanwhile, Toyota debuted the Prius Prime, a plug-in hybrid with a record-breaking 120 MPGe rating. Hybrid Air Vehicles launched the world's largest airship, which can fly for three weeks straight without a crew. And frequent fliers will be relieved to learn that Airbus has developed a new plane designed to eliminate jet lag.