C.B.&Q. E5A as used on both trains

The Naperville train disaster occurred April 25, 1946, on the Chicago, Burlington and Quincy Railroad at Loomis Street in Naperville, Illinois when the railroad's Exposition Flyer rammed into the Advance Flyer, which had made an unscheduled stop to check its running gear. The Exposition Flyer had been coming through on the same track at 85 miles per hour (137 km/h). 45 people died, and some 125 were injured.

• http://en.wikipedia.org/wiki/Naperville train disaster