Is it practical to bring a folding bike on a commercial airliner as carry on baggage in the overhead bin? How would you do this - which bike, what case or no case at all? You'd need to be able to ride the bike on the way to the airport (e.g. to get to light rail line to airport), fly, then ride it at the other end. I vaguely recall seeing a wheeled case that could be towed behind the bike, but don't remember if it was overhead-bin-sized.