![Detroit's River Days festival adds zip lines, air show to this year's lineup]()
Sherri Welch
- Zip lines and a new, Tuskegee Airmen National Historical Museum air show are among the additions to the 2015 GM River Days presented by Soaring Eagle Casino & Resort. This year marks the fifth year General Motors Co. has signed on as title sponsor of the festival, which is now in its ninth year. Organized by the Detroit Riverfront Conservancy, the festival takes place June 19-21, from the Detroit/Wayne County Port Authority Terminal and Dock just west of the GM Renaissance Center on