Amazon’s Zoox on Wednesday launched its robotaxi service in Las Vegas, offering free rides through parts of the entertainment mecca for anyone willing to gamble on the safety of a driverless vehicle. The Las Vegas debut of Zoox’s long-planned ride-hailing service reflects Amazon-owned robotaxi maker’s confidence in the safety of its boxy vehicles after two years of testing them in the city.  Zoox's robotaxis will pick up and drop off passengers at five designated locations, and the rides will be free for a few months.