Twin Zephyr hoopla By | March 25, 2023 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Crowds swarm around Burlington Route 9901 and 9902, the original three-car Twin Zephyr diesel trains, during a publicity event before the pair entered service between Chicago and the Twin Cities in April 1935. CB&Q photo