2:57 Timelapse of the 2013 Detroit Free Press/Talmer Bank Marathon Expo build and first day. Shot from Wednesday, Oct. 16, 2013 through close of Expo Friday, October 18, 2013. Edited for time. This time-lapse video gives a birds-eye view of the setup and first day of the 2013 Heath and Fitness Expo, including racer packet pickup for the 36th annual Detroit Marathon. Hundreds of Cobo employees and marathon volunteers transform an empty convention floor into an energized expo hall -- ready for tens of thousands of runners and their families.