Oh there's definitely a cab on both ends of the C-car. Multiple press releases have stated that the "C-cars can still be operated individually". Of course technically you can move a piece of equipment individually if there is only one cab. But I think its fairly safe to assume they are referring to running the unit in revenue service. It would make no sense to design a piece of equipment intended to be operated as a single unit in revenue service with a cab on only one end. The engineer is not going to be sitting in the tail end operating the train backwards half the time with the conductor on the head end calling out signals and giving cars counts to stops. In addition if there was no cab on the conductors end that means there's no cab controls to operate the headlight, bell, whistle and the emergency brakes there(those controls are what makes a cab afterall). If the person on the leading end of the unit does not have access to those controls than the train would be restricted to a maximum speed of 25mph while reversing. And the promise was to make it to the airport in twenty-five minutes afterall, not a hundred and twenty-five minutes.