Starting Thursday, CTA riders won’t be able to buy the magnetic strip cards or add money to their existing Chicago cards. This is one of the final phases before the Ventra payment system takes over completely. The CTA says the kinks have been worked out, but many riders still have questions. And bus drivers have become the last line of defense between potentially angry passengers and their Ventra cards. We talk about some of the challenges with a representative of the bus drivers union. (Photo: Flickr/Steven Vance)