Images from 
The Mighty Mac
Images from 
The Mighty Mac
The Detroit Science Center, with assistance from the American Bridge Division of U.S. Steel, has assembled an 80-foot-long replica of the Mackinac Bridge to commemorate its golden anniversary. The Mini Mac is the largest single exhibit ever assembled and displayed at the science center. It connects two sections of the museum with a four-foot-wide walkway.
Images from 
The Mighty Mac
Black and white photos courtesy of the Mackinac Bridge Authority.