USA Today: Taken your hydrogen-powered FreedomCAR out for a spin lately? Nope? Well, there is plenty of time to sign up for one, suggests a National Research Council report that pegs 2020 for the arrival of the mass-market fuel cell vehicle. That’s the best case scenario, of course, assuming technology, government, industry and the public all cooperate on bringing hydrogen cars to the nation’s highways. “The use of hydrogen fuel cell vehicles can achieve large and sustained …