After Electro-Motive's "Aerotrain" concept failed to reinvigorate passenger rail travel, partly due to the train's poor design, the Rock Island acquired both trainsets for use in commuter service. Originally, No.1 went to the Pennsylvania while No.2 tested on the New York Central. Seen here is No.2 arriving at Chicago's Englewood Union Station on April 21, 1965. Today, sections of both sets survive; No.2 resides at the National Railroad Museum in Green Bay, Wisconsin while the Museum of Transportation in St. Louis has No.1.